*Excludes Observations that spanned multiple years

Pre 197010
19700
19711
19720
19730
19740
19750
19761
19770
19782
19790
19800
19811
19820
19830
19840
19850
19860
19870
19880
19891
19900
19910
19920
19930
19940
19950
19961
19970
19981
19990
20000
20010
20020
20031
20040
20050
20060
20070
20080
20090
20100
20110
20123
20130
20140
20150
20160
20170
20180
20193
20200
20210
20220
20230
20240
Total25