*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19722
19730
19740
19752
19764
19770
19781
19790
19800
19810
19822
19830
19840
19850
19860
19870
19880
19890
19901
19912
199215
199310
19941
199561
1996113
19970
19983
19990
20000
200110
20021
200347
20040
20050
200621
200720
200823
200916
201022
201134
20120
20130
20140
20150
20162
20170
20182
20191
20201
20211
20220
20234
20240
Total423