*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19761
19770
19780
19790
19800
19811
19820
19830
19840
19850
19860
19871
19880
19890
19900
19910
19922
19931
19941
19950
19960
19971
19980
19990
20000
20010
20020
20030
20041
20050
20061
20070
20080
20090
20100
20110
20121
20130
20140
20150
20160
20170
20180
20190
20200
20211
20220
20231
20240
Total15