*Excludes Observations that spanned multiple years

Pre 197015
19700
19711
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19842
19850
19860
19870
19880
19890
19900
19910
19920
19930
19941
19950
19962
19970
19980
19990
20000
20011
20020
20030
20041
20050
20062
20073
20081
20090
20100
20110
20121
20130
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total30