*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19782
19790
19800
19810
19821
19830
19840
19850
19860
19870
19881
19890
19900
19911
19920
19930
19940
19950
19961
19970
19980
19990
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20111
20122
20132
20140
20152
20162
20170
20181
20192
20202
20210
20222
20230
20240
Total23