Year	Measure
1800	5
1840	3
1845	3
1849	3
1853	1
1858	1
1863	1
1868	1
1873	1
1878	1
1883	1
1888	1
1893	1
1898	1
1900	2
1901	2
1902	2
1903	2
1904	2
1905	2
1906	2
1907	2
1908	2
1909	2
1910	2
1911	2
1912	2
1913	2
1914	2
1915	2
1916	2
1917	2
1918	2
1919	2
1920	2
1921	2
1922	2
1923	2
1924	2
1925	2
1926	2
1927	2
1928	2
1929	2
1930	2
1931	2
1932	2
1933	2
1934	2
1935	2
1936	1
1937	1
1938	1
1939	1
1940	1
1941	1
1942	1
1943	1
1944	1
1945	1
1946	1
1947	1
1948	1
1949	1
1950	1
1951	1
1952	1
1953	1
1954	1
1955	1
1956	1
1957	1
1958	1
1959	1
1960	1
1961	1
1962	1
1963	1
1964	1
1965	1
1966	1
1967	1
1968	1
1969	1
1970	1
1971	1
1972	1
1973	1
1974	1
1975	1
1976	1
1977	1
1978	1
1979	1
1980	1
1981	1
1982	1
1983	1
1984	1
1985	1
1986	1
1987	1
1988	1
1989	1
1990	1
1991	1
1992	1
1993	1
1994	1
1995	1
1996	1
1997	1
1998	1
1999	1
2000	1
2001	1
2002	1
2003	1
2004	1
2005	1
2006	1
2007	1
2008	2
2009	2