*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19851
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19971
19982
19990
20003
20012
20020
20030
20040
20051
20060
20070
20080
20090
20102
201112
201215
20130
201443
201510
201695
20175
201866
201944
202037
202147
202239
202347
20240
Total474