*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19750
19760
19770
19781
19792
19800
19810
19820
19831
19842
19851
19861
19870
19880
19890
19900
19910
19924
19933
19942
19953
19960
19971
19986
19995
20005
20011
20020
20032
20040
20052
20060
20074
20087
200914
20105
201133
20122
20130
20147
201517
201613
20173
20186
20199
202010
202114
202233
202330
202455
Total304