*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
19920
19930
19940
19952
19963
19973
19981
19991
20001
20012
20020
20035
20048
20050
20060
20070
20083
20093
20100
20112
20125
20131
20145
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total46