*Excludes Observations that spanned multiple years

Pre 197070
19701
19713
19723
19730
19740
19751
19762
19771
19783
19791
19800
19811
19821
19830
19840
19850
19860
19870
19880
19891
19900
19910
19920
19937
19940
19950
19961
19971
19980
19996
20000
20010
20022
20033
20040
200543
200669
20079
200811
200924
201041
20115
201219
20130
20140
20150
20160
20170
Total329