*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19724
19730
19741
19755
19764
19776
19780
19791
19800
19810
19820
19831
19840
19850
19860
19870
19881
19890
19900
19914
19922
19933
19941
19952
199678
19970
19983
19990
20000
200113
20020
200320
20040
20050
200611
20079
20089
200911
201017
201132
20120
20130
20140
20150
20163
20170
20183
20190
20200
20212
20220
20233
20240
Total249