*Excludes Observations that spanned multiple years

Pre 19706
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19851
19860
19872
19880
19891
19900
19910
19920
19930
19942
19951
19961
19970
19980
19990
20001
20010
20020
20031
20040
20050
20060
20075
20081
20090
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total22