*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19741
19750
19760
19770
19780
19790
19800
19810
19820
19831
19841
19850
19860
19871
19880
19890
19900
19910
19920
19930
19940
19950
19960
19970
19980
19995
20002
20010
20024
20030
20041
20050
20061
20073
20080
20090
20100
20111
20120
20131
20141
20150
20160
20170
20182
20190
20200
20210
20224
20230
20240
Total31