Civilian girls I was with, when I met them they were:
1980 - she was 15 (I was 17). Full bush.
1984 - she was 19. Full bush, then trimmed, then bald by 1988.
1990 - she was 20. Full bush.
1991 - she was 21. Full bush.
1992 - she was 19. Trimmed.
1993 - she was 19. Bald.
1994 - she was 19. Trimmed, then bald by 1995.
1995 - she was 25. Bald.
1996 - she was 26. Trimmed.
1997 - she was 40. Bald.
1997 - she was 27. Trimmed.
1998 - she was 41. Bald.
1999 - she was 28. Trimmed.
2002 - she was 29. Bald.
2004 - she was 43. Trimmed.
2009 - she was 24. Bald.
2010 - she was 40. Trimmed.
2011 - she was 19. Bald.
Civilian girls at Wreck Beach since 2009: approximately 50% bald, 45% trimmed, 5% full bush.
So from personal experience I think there is a trend towards younger women being bald and that there is nobody left with a disgusting full bush. Furthermore, I think the ones of late who are trimmed had ugly pussies, so shaving would have exposed all that. One of the girls who I listed was 19, was trimmed when I met her then shaved it only once because she found that her pussy was very unattractive (huge lips that hung low). I think that is a typical reason why some girls don't shave.