Year                                      Female Population
            Male       Female       Total    Relative to 1850
   1850     11,838      11,354      23,192        1.000
   1860     16,085      15,358      31,443        1.353
   1870     19,494      19,065      38,559        1.679
   1880     25,519      24,637      50,156        2.170
   1890     32,237      30,711      62,948        2.705
   1900     38,816      37,178      75,994        3.274
   1910     47,332      44,640      91,972        3.932
   1920     53,900      51,810     105,710        4.563
   1930     62,137      60,638     122,775        5.341
   1940     66,062      65,608     131,670        5.778
   1950     75,187      76,139     151,326        6.706
   1960     88,341      90,992     179,333        8.014
   1970     98,926     104,309     203,235        9.187
   1980    110,053     116,493     226,546       10.260
   1989    120,982     127,258     248,240       11.208
   1990    121,239     127,471     248,710       11.227
   1991    122,979     129,198     252,177       11.379
   1992    124,358     130,564     254,922       11.499
   1993    125,699     131,893     257,592       11.616
   1994    127,010     133,194     260,204       11.731
   1995    128,292     134,461     262,753       11.843
   2000    134,338     140,477     274,815       12.372

Data beyond 1995 are projections.

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Comments

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        It is clear that the United States Population has been anything but stable since 1850. Roentgen's discovery of the x-ray occurred in 1895, so our tabulation covers the period from 45 years before the discovery up through the present period.

        In all our considerations of breast-cancer, we must keep in mind that an increasing population can be anticipated to have an increasing number of breast-cancers, if all other factors are held constant.

        However, there is no way that female population increase alone can account for the enormous rise in breast-cancer incidence, as shown beneath Table 1.