*Excludes Observations that spanned multiple years

Pre 19702
19702
19711
19722
19730
19740
19750
19761
19770
19781
19790
19801
19810
19823
19832
19841
19851
19865
198715
198852
198916
199037
199172
199226
199323
199434
199559
199618
199748
199816
199921
20005
20014
20024
200313
200413
200512
200613
20073
200821
200910
20102
20110
20122
20130
20142
20153
201613
20176
20180
Total585