*Excludes Observations that spanned multiple years

Pre 19702
19700
19710
19720
19730
19740
19750
19760
19771
19780
19794
19800
19811
19820
19830
19841
19856
19861
19871
19881
19892
19902
19910
19921
19931
19943
19954
19962
19970
19982
19995
20006
20014
20029
200328
200431
200522
200664
200724
20089
200913
20104
20115
201219
20132
20143
20152
20161
20170
20180
Total286