*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19843
19851
19860
19874
19884
19891
19901
19911
19920
19930
19940
19951
19960
19971
19980
19991
20000
20010
20020
20030
20040
20050
20060
20070
20080
20090
20100
20110
20120
20134
20140
20150
20160
20170
20180
20192
20201
20210
20223
20236
20241
Total35