Year	Measure
1800	1094
1801	1094
1802	1094
1803	1094
1804	1094
1805	1094
1806	1094
1807	1094
1808	1094
1809	1094
1810	1094
1811	1094
1812	1094
1813	1094
1814	1094
1815	1094
1816	1094
1817	1094
1818	1094
1819	1094
1820	1094
1821	1101
1822	1108
1823	1116
1824	1123
1825	1130
1826	1138
1827	1145
1828	1153
1829	1160
1830	1168
1831	1176
1832	1184
1833	1191
1834	1199
1835	1207
1836	1215
1837	1223
1838	1231
1839	1239
1840	1248
1841	1256
1842	1264
1843	1273
1844	1281
1845	1289
1846	1298
1847	1307
1848	1315
1849	1324
1850	1333
1851	1341
1852	1350
1853	1359
1854	1368
1855	1377
1856	1386
1857	1395
1858	1405
1859	1414
1860	1423
1861	1433
1862	1442
1863	1452
1864	1461
1865	1471
1866	1481
1867	1490
1868	1500
1869	1510
1870	1520
1871	1530
1872	1540
1873	1551
1874	1561
1875	1571
1876	1581
1877	1592
1878	1602
1879	1613
1880	1624
1881	1634
1882	1645
1883	1656
1884	1667
1885	1678
1886	1689
1887	1700
1888	1712
1889	1723
1890	1734
1891	1746
1892	1757
1893	1769
1894	1781
1895	1792
1896	1804
1897	1816
1898	1828
1899	1840
1900	1852
1901	1865
1902	1877
1903	1889
1904	1902
1905	1914
1906	1927
1907	1940
1908	1953
1909	1965
1910	1978
1911	1991
1912	2005
1913	2018
1914	2108
1915	2203
1916	2301
1917	2404
1918	2512
1919	2624
1920	2742
1921	2865
1922	2993
1923	3127
1924	3267
1925	3413
1926	3566
1927	3725
1928	3892
1929	4066
1930	4249
1931	4439
1932	4637
1933	4845
1934	5062
1935	5289
1936	5525
1937	5773
1938	6031
1939	6301
1940	6583
1941	6878
1942	7186
1943	7507
1944	7844
1945	8195
1946	8562
1947	8945
1948	9345
1949	9764
1950	10200
1951	10660
1952	11130
1953	11630
1954	12150
1955	12700
1956	13270
1957	13860
1958	14480
1959	15130
1960	15810
1961	16510
1962	17250
1963	18030
1964	18830
1965	19680
1966	20560
1967	21480
1968	22440
1969	23440
1970	24490
1971	24230
1972	24900
1973	26890
1974	27850
1975	28820
1976	29800
1977	30830
1978	31960
1979	33330
1980	35000
1981	37030
1982	39390
1983	43210
1984	44910
1985	44710
1986	46130
1987	48060
1988	52210
1989	54060
1990	58300
1991	56410
1992	55590
1993	55750
1994	56190
1995	56360
1996	56640
1997	57220
1998	58080
1999	57780
2000	56350
2001	54940
2002	54370
2003	54120
2004	53410
2005	55750
2006	56750
2007	57510
2008	56610
2009	51750
2010	49600
2011	49690
2012	49300
2013	49340