*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19722
19730
19741
19751
19760
19770
19780
19791
19801
19811
19820
19831
19841
19851
19860
19873
19882
19890
19900
19910
19921
19932
19943
19951
19960
19970
19982
19991
200010
20016
20023
20030
20041
20051
20060
20072
20081
20092
20100
20111
20122
20131
20141
20150
20161
20170
20181
201913
20207
20217
20229
20238
202416
Total118