*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19853
19860
19871
19883
19891
19902
19919
19926
19933
19945
19952
19964
19977
19980
19991
20002
20015
20021
20037
20045
20051
200612
20074
20089
200910
20108
20116
201211
20134
20140
20150
20160
20170
20180
20190
20200
20210
20220
20230
20240
Total132