*Excludes Observations that spanned multiple years

Pre 19701
19700
19712
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19820
19830
19840
19850
19860
198722
198812
19890
199021
19915
19924
19934
19947
19950
19960
19970
19980
199927
200021
20014
20023
20030
20042
20051
20061
20072
200818
200910
20103
20113
20127
20133
20141
20150
20161
20171
20182
20197
20200
20213
20221
20235
20240
Total204