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*Excludes Observations that spanned multiple years

Pre 19702
19700
19717
19721
19732
19741
19750
19760
19774
19781
19791
19801
19811
19820
19833
198493
1985232
1986173
1987249
1988864
1989119
1990104
1991333
1992143
1993659
1994411
1995276
1996171
1997153
199815
1999146
200099
200150
200236
200380
200475
200587
200679
200787
200880
200996
201074
2011107
2012162
2013109
2014107
201594
201694
201786
20183
20190
20200
20210
Total5770