*Excludes Observations that spanned multiple years

Pre 197054
19701
19710
19720
19732
19740
19751
19765
19773
19783
19797
19808
19819
19825
19832
19845
19854
19867
19874
19883
19893
19903
19915
19924
19939
19949
199527
199615
199723
199836
199929
200016
20018
200216
200336
200455
200568
200639
200734
2008127
2009144
201060
201129
201246
201336
201423
201534
201615
20174
Total1076