*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19791
19800
19810
19820
19830
19840
19850
19860
19870
19883
19890
19901
19910
19920
19938
19943
19954
19960
19977
19988
19990
20000
20010
20020
20030
20040
200513
20061
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20171
20181
20193
20203
20215
20223
202311
20241
Total78