Herb Keppler's findings (from the link I cited above) from 1993-95. Recall his mention that the Canon AE-1 was the all-time top selling SLR around 1979-80. At any rate, read 'em and weep.
Number of serious amateur and professional photographers:
1981 1/2 million
1993 1/2 million
rate of growth = zero
Number of cameras sold in U.S.:
SLR cameras:
1981 2.6 million
1993 725k*
rate of decline = 146k less per year ==> Is 1998 the year of the last SLR?
Point and Shoot (camera + fixed lens)
1981 800k
1993 13 million
Disposable cameras:
1981 -
1993 22 million USA
1993 62 million Japan
35mm film market - color print film = 96% slides, B&W, etc. = 4%
Source: Popular Photography, Sept. 1993 p. 14, Keppler's SLR column
*Popular Photography, Jan. 1995 p. 18, Keppler's SLR column
(originally projected 850k in Sept. 1993, sold only 725k SLRs)