*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19761
19770
19781
19790
19800
19810
19820
19830
19840
19851
19860
19874
19881
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
199922
20000
20010
20020
20030
20040
20050
20061
20071
20080
20090
20103
20110
20121
20131
20144
20151
20167
20170
20181
20190
20200
20212
20222
20230
20240
Total54