*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19831
19841
19850
19861
19870
19880
19891
19901
19913
19921
199322
19948
19957
19960
19974
19980
19990
20000
20010
20021
20030
20041
20050
20060
20070
20080
20090
20100
20110
20122
20131
20140
20150
20160
20170
20180
20192
20200
20210
20220
20230
20240
Total58