*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19731
19740
19750
19760
19770
19780
19790
19800
19811
19821
19830
19841
19850
19860
19872
19880
19890
19901
19913
19920
19931
19941
199534
19963
19972
19980
19992
20001
20013
20020
20030
20041
20050
20060
20070
20081
20092
20103
20119
20121
20130
20141
20151
20161
20171
20185
20193
20201
20214
20222
20230
20240
Total93