*Excludes Observations that spanned multiple years

Pre 197053
19701
19711
19721
19731
19742
19750
19761
19771
19780
19796
19800
19810
19821
19830
19840
19850
19861
19870
19880
19890
199011
199149
199217
19930
19944
19951
19961
19970
19980
19990
20002
20010
200211
20034
20044
200521
200618
200744
200844
200930
201032
201112
20126
20133
20140
20150
20160
20170
Total383