| Graphs |
Bar charts are proportional to record count, and scaled.
| Publication Year | Count | Percent | |
|---|---|---|---|
| 1921 | 1 | 0.0 | |
| 1922 | 4 | 0.1 | |
| 1923 | 13 | 0.2 | |
| 1924 | 24 | 0.4 | |
| 1925 | 49 | 0.7 | |
| 1926 | 110 | 1.7 | |
| 1927 | 56 | 0.8 | |
| 1928 | 51 | 0.8 | |
| 1929 | 52 | 0.8 | |
| 1930 | 48 | 0.7 | |
| 1931 | 41 | 0.6 | |
| 1932 | 45 | 0.7 | |
| 1933 | 46 | 0.7 | |
| 1934 | 37 | 0.6 | |
| 1935 | 31 | 0.5 | |
| 1936 | 44 | 0.7 | |
| 1937 | 45 | 0.7 | |
| 1938 | 46 | 0.7 | |
| 1939 | 37 | 0.6 | |
| 1940 | 31 | 0.5 | |
| 1941 | 20 | 0.3 | |
| 1942 | 12 | 0.2 | |
| 1943 | 13 | 0.2 | |
| 1944 | 7 | 0.1 | |
| 1945 | 12 | 0.2 | |
| 1946 | 24 | 0.4 | |
| 1947 | 29 | 0.4 | |
| 1948 | 58 | 0.9 | |
| 1949 | 87 | 1.3 | |
| 1950 | 89 | 1.3 | |
| 1951 | 99 | 1.5 | |
| 1952 | 85 | 1.3 | |
| 1953 | 82 | 1.2 | |
| 1954 | 81 | 1.2 | |
| 1955 | 89 | 1.3 | |
| 1956 | 81 | 1.2 | |
| 1957 | 91 | 1.4 | |
| 1958 | 96 | 1.4 | |
| 1959 | 94 | 1.4 | |
| 1960 | 83 | 1.3 | |
| 1961 | 78 | 1.2 | |
| 1962 | 91 | 1.4 | |
| 1963 | 71 | 1.1 | |
| 1964 | 71 | 1.1 | |
| 1965 | 87 | 1.3 | |
| 1966 | 93 | 1.4 | |
| 1967 | 109 | 1.6 | |
| 1968 | 85 | 1.3 | |
| 1969 | 96 | 1.4 | |
| 1970 | 83 | 1.3 | |
| 1971 | 74 | 1.1 | |
| 1972 | 108 | 1.6 | |
| 1973 | 103 | 1.6 | |
| 1974 | 82 | 1.2 | |
| 1975 | 99 | 1.5 | |
| 1976 | 75 | 1.1 | |
| 1977 | 127 | 1.9 | |
| 1978 | 102 | 1.5 | |
| 1979 | 96 | 1.4 | |
| 1980 | 85 | 1.3 | |
| 1981 | 99 | 1.5 | |
| 1982 | 116 | 1.7 | |
| 1983 | 81 | 1.2 | |
| 1984 | 88 | 1.3 | |
| 1985 | 95 | 1.4 | |
| 1986 | 89 | 1.3 | |
| 1987 | 86 | 1.3 | |
| 1988 | 78 | 1.2 | |
| 1989 | 72 | 1.1 | |
| 1990 | 99 | 1.5 | |
| 1991 | 85 | 1.3 | |
| 1992 | 84 | 1.3 | |
| 1993 | 100 | 1.5 | |
| 1994 | 98 | 1.5 | |
| 1995 | 102 | 1.5 | |
| 1996 | 128 | 1.9 | |
| 1997 | 127 | 1.9 | |
| 1998 | 133 | 2.0 | |
| 1999 | 133 | 2.0 | |
| 2000 | 156 | 2.4 | |
| 2001 | 154 | 2.3 | |
| 2002 | 199 | 3.0 | |
| 2003 | 173 | 2.6 | |
| 2004 | 172 | 2.6 | |
| 2005 | 27 | 0.4 |
Items: 85