*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19791
19802
19810
19820
19830
19841
19850
19860
19870
19880
19890
19900
19910
19922
19930
19940
19950
19960
19970
19982
19995
20002
20010
20020
20030
20040
20051
20062
20070
20080
20092
20100
20111
20120
20131
20143
20150
20161
20170
201812
20190
20201
20210
20220
20234
20240
Total43