*Excludes Observations that spanned multiple years

Pre 19705
19701
19711
19720
19730
19740
19750
19760
19770
19780
19790
19801
19810
19821
19830
19840
19850
19861
19873
198839
19891
199012
19916
199215
199312
19944
199524
19961
19978
19980
199920
200014
200110
200213
20031
200436
20050
200610
20073
200815
20096
20104
20113
20129
20134
20140
20150
20163
20171
20182
201911
20205
20217
20226
20239
20240
Total327