*Excludes Observations that spanned multiple years

Pre 19705
19700
19711
19720
19730
19740
19751
19760
19770
19781
19790
19800
19810
19821
19830
19840
19850
19860
19870
19880
19890
19900
19910
19924
19930
19941
19951
19962
19970
19980
19991
20000
20011
20022
20030
20040
20050
20060
20070
20082
20091
20100
20110
20120
20130
20140
20150
20160
20170
20180
20190
20203
20212
20220
20233
20243
Total35