*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19720
19732
19741
19758
19764
19770
19780
19792
19803
19810
19820
19830
19840
19850
19860
19870
19880
19893
19903
19910
19920
19932
199414
19951
199694
199712
199832
199964
200012
20014
200225
200311
200495
200516
200665
200761
200817
200962
201058
201113
20120
20130
20140
20150
20160
20170
Total687