*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19765
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
19870
19880
19890
19904
19919
19920
19933
19941
19959
199611
19973
19989
19990
20000
20010
20020
20030
20042
20050
20064
20071
200825
200938
201085
201132
201233
201323
201431
201522
201611
20172
20180
20191
20202
20210
20223
20232
20240
Total372