*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19751
19760
19770
19780
19790
19800
19810
19822
19830
19840
19850
19861
19870
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19990
20000
20010
20020
20030
20041
20050
20060
20070
20082
20090
201010
20118
20120
20130
20141
20150
20160
20171
20180
20190
20200
20210
20221
20232
20242
Total33