Year |
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Annual |
| 1931 | 11 | 10 | 8 | 5 | 6 | 4 | 10 | 9 | 1 | 5 | 13 | 16 | 98 |
| 1932 | 16 | 10 | 5 | 5 | 5 | 4 | 4 | 7 | 6 | 5 | 6 | 18 | 91 |
| 1933 | 6 | 10 | 7 | 7 | 6 | 2 | 13 | 4 | 6 | 3 | 3 | 10 | 77 |
| 1934 | 12 | 7 | 9 | 9 | 8 | 1 | 8 | 3 | 8 | 3 | 9 | 12 | 89 |
| 1935 | 6 | 6 | 6 | 11 | 8 | 10 | 10 | 5 | 6 | 3 | 10 | 7 | 88 |
| 1936 | 6 | 7 | 11 | 8 | 10 | 2 | 7 | 5 | 6 | 7 | 6 | 10 | 85 |
| 1937 | 22 | 9 | 13 | 4 | 2 | 8 | 7 | 8 | 6 | 5 | 8 | 10 | 102 |
| 1938 | 11 | 3 | 10 | 7 | 5 | 8 | 10 | 6 | 5 | 4 | 6 | 11 | 86 |
| 1939 | 15 | 14 | 7 | 7 | 8 | 10 | 7 | 10 | 3 | 4 | 8 | 10 | 103 |
| 1940 | 4 | 12 | 3 | 12 | 8 | 9 | 7 | 11 | 3 | 5 | 12 | 11 | 97 |
| 1941 | 8 | 8 | 9 | 9 | 12 | 11 | 10 | 11 | 12 | 9 | 9 | 9 | 117 |
| 1942 | 7 | 6 | 8 | 10 | 10 | 12 | 8 | 10 | 4 | 7 | 7 | 9 | 98 |
| 1943 | 7 | 5 | 13 | 4 | 8 | 9 | 11 | 4 | 10 | 2 | 5 | 10 | 88 |
| 1944 | 13 | 13 | 8 | 10 | 12 | 7 | 6 | 9 | 6 | 2 | 11 | 10 | 107 |
| 1945 | 8 | 9 | 16 | 9 | 5 | 10 | 11 | 9 | 11 | 10 | 8 | 10 | 116 |
| 1946 | 15 | 10 | 9 | 5 | 16 | 8 | 7 | 9 | 4 | 9 | 13 | 10 | 115 |
| 1947 | 18 | 9 | 10 | 9 | 10 | 6 | 5 | 6 | 3 | 3 | 13 | 9 | 101 |
| 1948 | 15 | 17 | 12 | 8 | 7 | 4 | 7 | 8 | 2 | 3 | 14 | 4 | 101 |
| 1949 | 15 | 11 | 10 | 11 | 5 | 8 | 16 | 8 | 6 | 15 | 1 | 14 | 120 |
| 1950 | 18 | 12 | 8 | 11 | 11 | 6 | 9 | 4 | 7 | 4 | 2 | 3 | 95 |
| 1951 | 9 | 8 | 7 | 8 | 3 | 7 | 5 | 3 | 12 | 3 | 6 | 13 | 84 |
| 1952 | 6 | 9 | 9 | 7 | 9 | 5 | 7 | 2 | 4 | 0 | 10 | 11 | 79 |
| 1953 | 7 | 14 | 12 | 7 | 10 | 2 | 11 | 8 | 2 | 1 | 9 | 12 | 95 |
| 1954 | 13 | 3 | 8 | 4 | 7 | 3 | 4 | 3 | 4 | 9 | 3 | 6 | 67 |
| 1955 | 11 | 7 | 5 | 8 | 7 | 7 | 12 | 8 | 7 | 2 | 5 | 3 | 82 |
| 1956 | 7 | 8 | 7 | 6 | 7 | 11 | 1 | 3 | 1 | 6 | 7 | 8 | 72 |
| 1957 | 14 | 11 | 7 | 16 | 11 | 11 | 8 | 4 | 9 | 5 | 17 | 5 | 118 |
| 1958 | 6 | 8 | 11 | 12 | 8 | 9 | 4 | 7 | 13 | 7 | 9 | 4 | 100 |
| 1959 | 6 | 14 | 5 | 9 | 3 | 10 | 9 | 10 | 9 | 5 | 4 | 11 | 95 |
| 1960 | 12 | 7 | 6 | 5 | 3 | 8 | 8 | 14 | 5 | 7 | 9 | 13 | 97 |