*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19740
19751
19760
19770
19781
19790
19800
19810
19821
19830
19840
19851
19860
19873
19881
19890
19903
19914
19921
19930
19943
19952
19962
19970
19983
19992
20000
20012
20020
20031
20047
20052
20062
200713
20083
20093
201010
20116
20125
20138
201413
20152
20169
201715
201810
20194
20203
20212
20227
20230
20241
Total156