*Excludes Observations that spanned multiple years

Pre 19700
19700
19714
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
198645
1987103
1988288
19895
199013
199151
199245
199331
199418
1995113
1996128
1997152
199823
199948
200012
200135
200219
20030
20041
20051
20061
20071
20081
20093
20101
20110
20122
20132
20140
20152
20160
20170
20180
20191
20200
20210
20220
Total1150