*Excludes Observations that spanned multiple years

Pre 19701
19701
19710
19720
19730
19740
19750
19760
19770
19781
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20040
20050
20061
20070
20082
20090
20102
20111
20120
20130
20141
20150
20162
201722
20184
20199
20201
20210
20223
20230
20240
Total51