*Excludes Observations that spanned multiple years

Pre 197076
19702
19710
19720
19730
19742
19751
19761
19771
19780
19794
19803
19810
19822
19831
19842
19851
19860
19871
19883
19895
19906
199111
199211
19937
19946
19956
19960
19972
19981
199911
200018
20016
20020
20031
20044
20054
20063
20074
200811
200917
201030
201119
20127
20139
20145
201514
201622
201713
201828
201913
20207
20212
20220
Total403