*Excludes Observations that spanned multiple years

Pre 197054
19701
19711
19721
19731
19742
19750
19761
19771
19780
19796
19800
19810
19821
19833
19840
19850
19861
19870
19880
19890
199033
199161
199232
19937
199413
19953
19961
19970
19980
19990
20002
20010
200211
20038
20045
200521
200630
200778
200859
200935
201032
201116
201221
201331
201459
201512
20160
20170
20180
Total643