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Numbers in italics are estimated.
| 1919 | 17200 | |
| 1920 | 19500 | |
| 1921 | 27000 | |
| 1922 | 35300 | |
| 1923 | 41000 | |
| 1924 | 47100 | |
| 1925 | 54300 | |
| 1926 | 64700 | |
| 1927 | 76200 | |
| 1928 | 83200 | 1027 |
| 1929 | 89300 | 2982 |
| 1930 | 95500 | 7119 |
| 1931 | 100400 | 7847 |
| 1932 | 105400 | 8575 |
| 1933 | 107600 | 9303 |
| 1934 | 110000 | 10031 |
| 1935 | 113000 | 10758 |
| 1936 | 117200 | 14526 |
| 1937 | 119400 | 15396 |
| 1938 | 125400 | 18861 |
| 1939 | 129500 | 20563 |
| 1940 | 132900 | 23231 |
| 1941 | 136500 | 24572 |
| 1942 | 140200 | 26643 |
| 1943-44 | 142100 | |
| 1945 | 143600 | |
| 1946 | 154300 | |
| 1947 | 161500 | |
| 1948 | 165300 | |
| 1949 | 170400 | |
| 1950 | 172200 | |
| 1951 | 175100 | |
| 1952 | 179300 | 41693 |
| 1953 | 183100 | 45824 |
| 1954 | 187600 | 49586 |
| 1955 | 193700 | 52662 |
| 1956 | 194200 | 56162 |
| 1957 | 201800 | 66719 |
| 1958 | 203900 | 66727 |
| 1959 | 205400 | 70988 |
| 1960 | 209100 | 76224 |
| 1961 | 211700 | 81885 |
| 1962 | 214000 | 87850 |
| 1963 | 218800 | |
| 1964 | 700000 |