| Table 1. Lynx fur returns from 1919 to 1957. (Adapted from Mooney, D. D. and R. J. Swift. 1999. A course in mathematical modeling. The Mathematical Association of America. ISBN 0-88385-712-X.) | |||||||
| Year | Return | Year | Return | Year | Return | Year | Return |
| 1919 | 8,378 | 1929 | 7,572 | 1939 | 7,411 | 1949 | 3,714 |
| 1920 | 6,456 | 1930 | 7,957 | 1940 | 6,583 | 1950 | 9,592 |
| 1921 | 11,617 | 1931 | 8,410 | 1941 | 6,979 | 1951 | 6,653 |
| 1922 | 17,202 | 1932 | 11,916 | 1942 | 7,544 | 1952 | 12,636 |
| 1923 | 23,381 | 1933 | 16,781 | 1943 | 10,164 | 1953 | 10,876 |
| 1924 | 29,529 | 1934 | 22,012 | 1944 | 12,259 | 1954 | 13,876 |
| 1925 | 33,027 | 1935 | 22,448 | 1945 | 9,306 | 1955 | 9,660 |
| 1926 | 28,619 | 1936 | 17,534 | 1946 | 8,129 | 1956 | 8,397 |
| 1927 | 21,363 | 1937 | 10,523 | 1947 | 6,548 | 1957 | 8,958 |
| 1928 | 11,582 | 1938 | 8,079 | 1948 | 4,083 | ||
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