*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19871
19880
19891
19900
19910
19920
19930
19940
19950
19960
19970
19980
19991
20001
20010
20020
20030
20041
20050
20061
20070
20080
20090
20101
20111
20120
20131
20140
20150
20162
20170
20180
20190
20200
20210
20220
20230
20240
Total15