*Excludes Observations that spanned multiple years

Pre 1970100
19701
19710
19722
19732
19740
19751
19760
197711
197811
19790
19800
19813
19820
19830
19840
19850
19862
19870
19880
19892
19900
19912
19922
199315
19946
199526
199634
199739
19980
199974
20000
20016
20022
20030
20040
20050
20060
20071
20080
20090
20101
20112
20120
20130
20140
20150
20160
20170
20182
20190
20200
20212
20220
20230
20240
Total349