So just in case you were wondering (I'm sure at least some of you have been):
In 2004 we heard 261 separate 10@10 sets. Of those, 30 were "classics" and 43 were theme sets. I counted Vertical Tastings (of which there were five) in as theme sets, since they're sort of a hybrid, and not specific to a single year. There were three Soul Patrols, one of which was also a Vertical Tasting from 65 to 74.
There were several sets that were counted as both theme sets and year-specific, which accounts for the total shown below being 6 greater than the actual number of sets we heard: the 1971 Soul Patrol, the 1969 Moon Landing, the 1968 Democratic Convention, and three Republican Convention sets for 1968, 1972 and 1980.
Of the 230 year-specific sets (classics included), we visited 1976 most frequently: 12 times. This number surprised me--I would have guessed we'd hit 1982 most often. The least-visited years were, not surprisingly, the oldest and newest ones: 1965 and 1995, at once each. However, just the fact that we went to 1965 at all, and hit 1966 twice were the biggest surprises of the year, since we hadn't been back beyond 1967 in at least five years.
By the way, these numbers do not include the ten sets that were played on Oct. 10. As they all seemed to be classics, they were completely outside the normal routine of 10@10, and the "Ten 10@10s for 10/10" promotion isn't something that they do every year, I felt they would unfairly affect the results.
Here's the numbers, year by year:
1965 1
1966 2
1967 3
1968 7
1969 8
1970 5
1971 9
1972 9
1973 8
1974 8
1975 9
1976 12
1977 9
1978 11
1979 11
1980 10
1981 10
1982 10
1983 11
1984 10
1985 10
1986 5
1987 6
1988 7
1989 9
1990 6
1991 6
1992 5
1993 3
1994 3
1995 1
Theme 43
Total 267
Classic? 30
Theme sets: Martin Luther King, Vertical Tasting 74-83, By the Numbers, Beatles Come to America-30th Anniversary, Love Stinks, Mardi Gras, Hawaiian Surfin' Safari, Irish bands, Wing Ding, April Fools, Tax Day, Vertical tasting 74-83, Food, Earth Day, Cinco de Mayo, Soul Patrol Vertical Tasting 65-74, Ka-Boom, 71 Soul Patrol, Live from the Morning Show Archive, Summer, Gay Pride, Strictly Instrumental, SF Artists-60s, SF Artists-70s, Moon Landing day, SF Artists-80s, 1968 Chicago Democratic Convention, SF Artists-90s & Current, Hits from Hell-When Good Artists Go Bad, Detroit Radio in the 60s, 1968 Republican Convention, 1980 Republican Convention, 1972 Republican Convention, Soul Patrol, Labor Day, Vertical Tasting 73-82, Vertical Tasting 82-91, Halloween spook-tacular, Election Day, Latin bands, Turkeys, Bands we're thankful for, Foghead Xmas Card.
Also, I have partial numbers for 2003 (May thru Dec) that I didn't get around to compiling until just recently. If there's any interest, I can post those as well.