Some viscosity data that fit an AR(2) model: http://www.stat.psu.edu/~rathbun/stat510/data/models/viscous.txt
The following data sets are the number of lynx and rabbits from the Hudson Bay Company records for 1849-1890, the number of Canadian lynx from 1821 to 1934, and the Beveridge wheat price annual index from 1500 to 1867. The last two datasets are availiable at: http://www.york.ac.uk/depts/maths/data/ts/
year lynx hare 1849 43253 24301 1850 20604 15621 1851 9303 26781 1852 6722 54827 1853 4850 82430 1854 4907 82814 1855 10764 91316 1856 21511 70685 1857 32264 84489 1858 33038 95534 1859 27460 62543 1860 15968 29590 1861 7927 15409 1862 4616 18516 1863 4570 39258 1864 4760 5052 1865 17044 155461 1866 34732 144519 1867 68097 106279 1868 70372 45909 1869 39119 22668 1870 19992 631 1871 8086 3070 1872 5679 9932 1873 4839 6434 1874 10045 60520 1875 17849 49053 1876 18868 50934 1877 43575 104123 1878 37490 87722 1879 21291 65585 1880 14767 17593 1881 10053 10950 1882 7591 17830 1883 8016 13595 1884 27119 13072 1885 51414 45118 1886 73878 53522 1887 78555 136726 1888 33720 137685 1889 18726 94150 1890 11455 36286
lynx year 269 1821 321 1822 585 1823 871 1824 1475 1825 2821 1826 3928 1827 5943 1828 4950 1829 2577 1830 523 1831 98 1832 184 1833 279 1834 409 1835 2285 1836 2685 1837 3409 1838 1824 1839 409 1840 151 1841 45 1842 68 1843 213 1844 546 1845 1033 1846 2129 1847 2536 1848 957 1849 361 1850 377 1851 225 1852 360 1853 731 1854 1638 1855 2725 1856 2871 1857 2119 1858 684 1859 299 1860 236 1861 245 1862 552 1863 1623 1864 3311 1865 6721 1866 4245 1867 687 1868 255 1869 473 1870 358 1871 784 1872 1594 1873 1676 1874 2251 1875 1426 1876 756 1877 299 1878 201 1879 229 1880 469 1881 736 1882 2042 1883 2811 1884 4431 1885 2511 1886 389 1887 73 1888 39 1889 49 1890 59 1891 188 1892 377 1893 1292 1894 4031 1895 3495 1896 587 1897 105 1898 153 1899 387 1900 758 1901 1307 1902 3465 1903 6991 1904 6313 1905 3794 1906 1836 1907 345 1908 382 1909 808 1910 1388 1911 2713 1912 3800 1913 3091 1914 2985 1915 3790 1916 674 1917 81 1918 80 1919 108 1920 229 1921 399 1922 1132 1923 2432 1924 3574 1925 2935 1926 1537 1927 529 1928 485 1929 662 1930 1000 1931 1590 1932 2657 1933 3396 1934
year index 1500 17.0 1501 19.0 1502 20.0 1503 15.0 1504 13.0 1505 14.0 1506 14.0 1507 14.0 1508 14.0 1509 11.0 1510 16.0 1511 19.0 1512 23.0 1513 18.0 1514 17.0 1515 20.0 1516 20.0 1517 18.0 1518 14.0 1519 16.0 1520 21.0 1521 24.0 1522 15.0 1523 16.0 1524 20.0 1525 14.0 1526 16.0 1527 25.5 1528 25.8 1529 26.0 1530 26.0 1531 29.0 1532 20.0 1533 18.0 1534 16.0 1535 22.0 1536 22.0 1537 16.0 1538 19.0 1539 17.0 1540 17.0 1541 19.0 1542 20.0 1543 24.0 1544 28.0 1545 36.0 1546 20.0 1547 14.0 1548 18.0 1549 27.0 1550 29.0 1551 36.0 1552 29.0 1553 27.0 1554 30.0 1555 38.0 1556 50.0 1557 24.0 1558 25.0 1559 30.0 1560 31.0 1561 37.0 1562 41.0 1563 36.0 1564 32.0 1565 47.0 1566 42.0 1567 37.0 1568 34.0 1569 36.0 1570 43.0 1571 55.0 1572 64.0 1573 79.0 1574 59.0 1575 47.0 1576 48.0 1577 49.0 1578 45.0 1579 53.0 1580 55.0 1581 55.0 1582 54.0 1583 56.0 1584 52.0 1585 76.0 1586 113.0 1587 68.0 1588 59.0 1589 74.0 1590 78.0 1591 69.0 1592 78.0 1593 73.0 1594 88.0 1595 98.0 1596 109.0 1597 106.0 1598 87.0 1599 77.0 1600 77.0 1601 63.0 1602 70.0 1603 70.0 1604 63.0 1605 61.0 1606 66.0 1607 78.0 1608 93.0 1609 97.0 1610 77.0 1611 83.0 1612 81.0 1613 82.0 1614 78.0 1615 75.0 1616 80.0 1617 87.0 1618 72.0 1619 65.0 1620 74.0 1621 91.0 1622 115.0 1623 99.0 1624 99.0 1625 115.0 1626 101.0 1627 90.0 1628 95.0 1629 108.0 1630 147.0 1631 112.0 1632 108.0 1633 99.0 1634 96.0 1635 102.0 1636 105.0 1637 114.0 1638 103.0 1639 98.0 1640 103.0 1641 101.0 1642 110.0 1643 109.0 1644 98.0 1645 84.0 1646 90.0 1647 120.0 1648 124.0 1649 136.0 1650 120.0 1651 135.0 1652 100.0 1653 70.0 1654 60.0 1655 72.0 1656 70.0 1657 71.0 1658 94.0 1659 95.0 1660 110.0 1661 154.0 1662 116.0 1663 99.0 1664 82.0 1665 76.0 1666 64.0 1667 63.0 1668 68.0 1669 64.0 1670 67.0 1671 71.0 1672 72.0 1673 89.0 1674 114.0 1675 102.0 1676 85.0 1677 88.0 1678 97.0 1679 94.0 1680 88.0 1681 79.0 1682 74.0 1683 79.0 1684 95.0 1685 70.0 1686 72.0 1687 63.0 1688 60.0 1689 74.0 1690 75.0 1691 91.0 1692 126.0 1693 161.0 1694 109.0 1695 108.0 1696 110.0 1697 130.0 1698 166.0 1699 143.0 1700 103.0 1701 89.0 1702 76.0 1703 93.0 1704 82.0 1705 71.0 1706 69.0 1707 75.0 1708 134.0 1709 183.0 1710 113.0 1711 108.0 1712 121.0 1713 139.0 1714 109.0 1715 90.0 1716 88.0 1717 88.0 1718 93.0 1719 106.0 1720 89.0 1721 79.0 1722 91.0 1723 96.0 1724 111.0 1725 112.0 1726 104.0 1727 94.0 1728 98.0 1729 88.0 1730 94.0 1731 81.0 1732 77.0 1733 84.0 1734 92.0 1735 96.0 1736 102.0 1737 95.0 1738 98.0 1739 125.0 1740 162.0 1741 113.0 1742 94.0 1743 85.0 1744 89.0 1745 109.0 1746 110.0 1747 109.0 1748 120.0 1749 116.0 1750 101.0 1751 113.0 1752 109.0 1753 105.0 1754 94.0 1755 102.0 1756 141.0 1757 135.0 1758 118.0 1759 115.0 1760 111.0 1761 127.0 1762 124.0 1763 113.0 1764 122.0 1765 130.0 1766 137.0 1767 148.0 1768 142.0 1769 143.0 1770 176.0 1771 184.0 1772 164.0 1773 146.0 1774 147.0 1775 124.0 1776 119.0 1777 135.0 1778 125.0 1779 116.0 1780 132.0 1781 133.0 1782 144.0 1783 145.0 1784 146.0 1785 138.0 1786 139.0 1787 154.0 1788 181.0 1789 185.0 1790 151.0 1791 139.0 1792 157.0 1793 155.0 1794 191.0 1795 248.0 1796 185.0 1797 168.0 1798 176.0 1799 243.0 1800 289.0 1801 251.0 1802 232.0 1803 207.0 1804 276.0 1805 250.0 1806 216.0 1807 205.0 1808 206.0 1809 208.0 1810 226.0 1811 302.0 1812 261.0 1813 207.0 1814 209.0 1815 280.0 1816 381.0 1817 266.0 1818 197.0 1819 177.0 1820 170.0 1821 152.0 1822 156.0 1823 141.0 1824 142.0 1825 137.0 1826 161.0 1827 189.0 1828 226.0 1829 194.0 1830 217.0 1831 199.0 1832 151.0 1833 144.0 1834 138.0 1835 145.0 1836 156.0 1837 184.0 1838 216.0 1839 204.0 1840 186.0 1841 197.0 1842 183.0 1843 175.0 1844 183.0 1845 230.0 1846 278.0 1847 179.0 1848 161.0 1849 150.0 1850 159.0 1851 180.0 1852 223.0 1853 294.0 1854 300.0 1855 297.0 1856 232.0 1857 179.0 1858 180.0 1859 215.0 1860 258.0 1861 236.0 1862 202.0 1863 174.0 1864 179.0 1865 210.0 1866 268.0 1867 267.0 1868 208.0 1869 224.0