*Excludes Observations that spanned multiple years

Pre 19703
19700
19710
19721
19730
19740
19750
19761
19772
19782
19791
19801
19814
19821
19831
19841
19850
19861
19870
19880
19891
19901
19910
19922
19931
19940
19951
19960
19973
199812
19994
20003
20011
20022
2003182
20044
200539
20061
20072
20081
20091
20101
20111
20122
20131
20143
20150
20161
20173
20180
Total292