*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19840
19850
19860
19875
19880
19890
19900
19910
19920
19930
19940
19951
19960
19972
19980
19991
20000
20010
20020
20030
20040
20050
20060
200712
20080
20092
20103
20110
20124
20138
20147
20150
20160
20170
20182
20190
20200
20210
20220
20238
20241
Total59