*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19782
19792
19800
19810
19820
19830
19842
19850
19860
19870
19882
19890
19900
19910
19922
19931
19942
199546
19964
19971
19980
19990
20000
20010
20020
20030
20040
20056
20060
20070
20080
20090
20101
20110
20120
20130
20140
20150
20160
20170
20180
20198
20201
20210
20222
20230
20240
Total82