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Behavior
1975
No. of attendees: 120
1976
No. of attendees: 112
1977
No. of attendees: 172
1978
No. of attendees: 184
1979
No. of attendees: 224
1980
No. of attendees: 196
1981
No. of attendees: 180
1982
No. of attendees: 188
1983
No. of attendees: 172
