*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19901
19910
19921
19930
19940
19950
19962
19971
19981
19990
20000
20010
20020
20032
20043
20051
20065
20071
20085
20090
20100
20111
20121
20130
20141
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total26