*Excludes Observations that spanned multiple years

Pre 19704
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19902
19918
19921
19932
19941
19954
199611
19972
19980
19990
20000
20010
20020
20030
20040
20050
20062
20071
200821
200966
201040
201139
201224
201325
201422
201525
201617
20171
20182
20190
20202
20210
20221
20230
20241
Total324