← All namesWillis
Raw counts
| Year | Count |
|---|
| 1910 | 227 |
| 1911 | 260 |
| 1912 | 481 |
| 1913 | 644 |
| 1914 | 889 |
| 1915 | 1,130 |
| 1916 | 1,275 |
| 1917 | 1,306 |
| 1918 | 1,480 |
| 1919 | 1,530 |
| 1920 | 1,659 |
| 1921 | 1,644 |
| 1922 | 1,694 |
| 1923 | 5 |
| 1923 | 1,614 |
| 1924 | 5 |
| 1924 | 1,742 |
| 1925 | 1,650 |
| 1926 | 1,731 |
| 1927 | 1,392 |
| 1928 | 1,434 |
| 1929 | 1,412 |
| 1930 | 1,499 |
| 1931 | 1,233 |
| 1932 | 12 |
| 1932 | 1,246 |
| 1933 | 6 |
| 1933 | 1,031 |
| 1934 | 1,180 |
| 1935 | 1,040 |
| 1936 | 988 |
| 1937 | 5 |
| 1937 | 962 |
| 1938 | 872 |
| 1939 | 896 |
| 1940 | 799 |
| 1941 | 895 |
| 1942 | 865 |
| 1943 | 906 |
| 1944 | 729 |
| 1945 | 726 |
| 1946 | 661 |
| 1947 | 771 |
| 1948 | 716 |
| 1949 | 657 |
| 1950 | 599 |
| 1951 | 626 |
| 1952 | 660 |
| 1953 | 688 |
| 1954 | 487 |
| 1955 | 580 |
| 1956 | 578 |
| 1957 | 551 |
| 1958 | 464 |
| 1959 | 472 |
| 1960 | 508 |
| 1961 | 348 |
| 1962 | 429 |
| 1963 | 383 |
| 1964 | 373 |
| 1965 | 318 |
| 1966 | 276 |
| 1967 | 242 |
| 1968 | 233 |
| 1969 | 208 |
| 1970 | 293 |
| 1971 | 267 |
| 1972 | 249 |
| 1973 | 185 |
| 1974 | 179 |
| 1975 | 185 |
| 1976 | 189 |
| 1977 | 226 |
| 1978 | 171 |
| 1979 | 256 |
| 1980 | 250 |
| 1981 | 148 |
| 1982 | 211 |
| 1983 | 197 |
| 1984 | 157 |
| 1985 | 184 |
| 1986 | 144 |
| 1987 | 130 |
| 1988 | 151 |
| 1989 | 144 |
| 1990 | 127 |
| 1991 | 98 |
| 1992 | 80 |
| 1993 | 69 |
| 1994 | 60 |
| 1995 | 82 |
| 1996 | 87 |
| 1997 | 66 |
| 1998 | 59 |
| 1999 | 76 |
| 2000 | 48 |
| 2001 | 53 |
| 2002 | 30 |
| 2003 | 38 |
| 2004 | 22 |
| 2005 | 18 |
| 2006 | 37 |
| 2007 | 42 |
| 2008 | 10 |
| 2009 | 13 |
| 2010 | 5 |
| 2011 | 19 |
| 2012 | 39 |
| 2013 | 28 |
| 2014 | 21 |
| 2015 | 24 |
| 2018 | 10 |
| 2020 | 11 |
| 2023 | 20 |
| 2024 | 14 |