*Excludes Observations that spanned multiple years

Pre 19705
19701
19710
19720
19730
19740
19752
19760
19770
19780
19790
19801
19810
19820
19830
19840
19850
19860
19873
19881
19890
19900
19910
19923
19932
19940
199510
19960
19971
19980
19999
200021
20017
20023
20030
20041
20050
20061
20072
20080
20092
20102
20111
20120
20130
20140
20150
20160
20171
20180
20193
20201
20211
20220
20231
20240
Total85