*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19801
19810
19821
19830
19840
19851
19860
19870
19880
19890
19900
19910
19921
19930
19942
19950
19964
19970
19982
19990
20001
20010
20020
20030
20040
20050
20060
20076
20081
20090
20104
20112
20120
20130
20140
20150
20160
20173
20180
20190
20200
20210
20222
20230
20240
Total33