*Excludes Observations that spanned multiple years

Pre 197013
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19850
19860
19871
19880
19890
19900
19910
19920
19930
19940
19950
19960
19971
19980
19990
20000
20010
20020
20030
20040
20051
20060
20070
20080
20090
20108
201123
20120
20130
20141
20150
20163
20170
20181
20194
20202
20212
20225
20232
20241
Total69