*Excludes Observations that spanned multiple years

Pre 197034
19701
19711
19721
19732
19740
19750
19762
19773
19780
19790
19800
19811
19820
19830
19840
19850
19860
19870
19880
19890
19905
19915
19929
19933
199425
199534
199613
199710
19987
199910
20001
20011
20024
200316
20044
20055
20069
200721
20085
200912
20103
201112
201221
20139
201424
201519
201611
20175
Total348