*Excludes Observations that spanned multiple years

Pre 197056
19700
19711
19721
19731
19741
19752
19762
19771
19781
19790
19801
19815
19821
19835
19841
19851
19861
19870
19880
19890
19901
19910
19923
19932
19940
19951
19961
19971
19981
19994
20000
20012
20020
20031
20040
20051
20060
20073
20081
20090
20101
20115
20121
20132
20146
20150
20164
20174
20188
20194
202018
202123
202241
20238
202431
Total259