*Excludes Observations that spanned multiple years

Pre 197012
19700
19710
19720
19730
19740
19750
19760
19770
19780
19790
19800
19810
19821
19830
19841
19850
19861
19877
19882
19896
19903
19912
19924
19939
19940
19957
19967
19978
19982
19993
20001
20011
20020
200317
200417
20055
200617
200716
200822
200920
201011
201119
201211
201347
201412
20155
201615
201714
201812
20197
20206
202117
20222
20231
20241
Total371