This I found to be interesting. As can be seen the number of courses measured is still increasing. Please note 2008 is not complete and I expect another 50 courses.
Courses Certified Number of
By Year Courses
1979 1
1980 0
1981 0
1982 20
1983 518
1984 829
1985 1244
1985 1236
1986 1162
1987 1109
1989 1084
1990 1148
1991 1221
1992 1203
1993 1168
1994 1054
1995 1150
1996 1114
1997 1218
1998 1170
1999 1196
2000 1111
2001 1251
2002 1208
2003 1294
2004 1391
2005 1359
2006 1443
2007 1582
2008 1687
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