#year   number_entries
1850 0
1851 0
1852 0
1853 0
1854 0
1855 0
1856 0
1857 0
1858 0
1859 0
1860 0
1861 0
1862 0
1863 0
1864 0
1865 0
1866 0
1867 0
1868 0
1869 0
1870 0
1871 0
1872 0
1873 0
1874 0
1875 0
1876 0
1877 0
1878 0
1879 0
1880 0
1881 0
1882 0
1883 0
1884 0
1885 0
1886 0
1887 0
1888 0
1889 0
1890 0
1891 0
1892 0
1893 0
1894 0
1895 0
1896 0
1897 0
1898 0
1899 0
1900 0
1901 0
1902 0
1903 0
1904 0
1905 0
1906 0
1907 0
1908 0
1909 0
1910 0
1911 0
1912 0
1913 0
1914 0
1915 0
1916 0
1917 0
1918 0
1919 0
1920 0
1921 0
1922 0
1923 0
1924 0
1925 0
1926 0
1927 0
1928 0
1929 0
1930 0
1931 0
1932 0
1933 0
1934 0
1935 0
1936 0
1937 0
1938 0
1939 0
1940 1
1941 0
1942 0
1943 0
1944 0
1945 0
1946 0
1947 0
1948 0
1949 21
1950 10
1951 23
1952 26
1953 31
1954 28
1955 12
1956 8
1957 27
1958 15
1959 23
1960 16
1961 16
1962 9
1963 6
1964 5
1965 0
1966 1
1967 0
1968 1
1969 0
1970 0
1971 0
1972 0
1973 0
1974 2
1975 0
1976 0
1977 0
1978 0
1979 0
1980 0
1981 0
1982 1
1983 2
1984 0
1985 0
1986 0
1987 1
1988 0
1989 1
1990 0
1991 0
1992 0
1993 0
1994 0
1995 0
1996 0
1997 0
1998 0
1999 1
2000 1
2001 0
2002 0
2003 0
2004 0
2005 0
2006 0
2007 0
2008 0
2009 0
2010 0
2011 0
2012 0
2013 0
2014 0
2015 0
2016 0
2017 0
2018 0
2019 0