*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19862
19872
19881
198916
199019
199176
199212
199346
199429
199568
19960
19970
19980
19990
20000
20010
20020
20030
20042
20050
20060
20070
20081
20090
20100
20110
20120
20130
20140
20150
20160
20171
20180
20190
202043
202160
20222
2023262
20240
Total643