*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19870
19880
19891
19900
19911
19923
19932
19940
19950
19960
19970
19980
19990
20000
20011
20020
20030
20040
20050
20066
20070
20082
20090
20101
20110
20120
20130
20141
20150
20163
20171
20181
20190
20200
20210
20220
20230
20240
Total27