*Excludes Observations that spanned multiple years

Pre 19708
19700
19711
19720
19731
19740
19751
19761
19770
19780
19790
19802
19810
19820
19830
19842
19851
19861
19871
19881
19890
19903
19912
19920
19931
19940
19953
19965
199710
19982
19994
20002
20010
200210
200312
200446
200585
2006102
2007117
200894
200979
201029
201113
201223
201312
20142
201567
2016114
201786
201866
201988
20202
202156
20221
Total1156