*Excludes Observations that spanned multiple years

Pre 19706
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19842
19850
19860
19870
19880
19890
19900
19910
19921
19931
19940
19953
19960
19970
19980
19990
20000
20010
20020
20032
20040
20050
20064
20070
20082
20090
20101
20111
20120
20130
20140
20152
20161
20171
20181
20190
20200
20210
20221
20230
20240
Total30