*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19721
19731
19740
19750
19762
19771
19783
19791
19800
19810
19820
19831
19842
19850
19860
19870
19887
19890
19900
19911
19920
19931
19941
19950
19960
19970
19980
19990
20000
20010
20021
20030
20040
20050
20061
20070
20080
20090
20100
20111
20123
201310
20140
20150
20160
20170
20181
20190
20200
20210
20220
Total41