*Excludes Observations that spanned multiple years

Pre 197012
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19905
199111
19922
19931
199421
199527
199622
19976
19981
19990
20000
20011
20020
20030
20041
20050
20062
20070
20084
200917
201038
201129
201233
201326
201420
201526
201613
20170
20180
20190
20200
20210
20220
20230
20240
Total318