*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19740
19750
19763
19772
19788
19790
19800
19810
19822
19830
19840
19851
19860
19870
19882
19891
19900
19910
19922
199312
19943
19953
19960
19974
19986
19992
20002
20010
20020
20035
20042
20054
20060
20070
20080
20090
20100
20110
20120
20130
20140
20150
20160
20170
Total65