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*Excludes Observations that spanned multiple years

Pre 197039
19705
19710
19720
19730
19740
19750
19760
19770
19781
19790
19801
19810
19820
19830
19840
19850
19861
19870
19880
19891
19900
19914
19921
199311
199427
199554
19965
19978
19982
19997
20001
20010
20021
200316
20046
200550
200684
200728
2008209
2009253
2010171
201189
2012144
2013147
2014162
2015109
201673
201729
201810
20197
20200
20210
Total1756