*Excludes Observations that spanned multiple years

Pre 197097
19700
19710
19720
19731
19743
19755
19761
19770
19781
19790
19801
19810
19820
19830
19840
19854
19860
19870
19881
19893
19900
19910
19920
19930
19941
19950
19961
19976
19980
19991
20002
20016
20023
20033
20042
20052
200619
20072
20086
20097
201014
201112
201223
201355
20149
201517
201611
201712
201824
201931
202020
202135
202249
20230
Total490