*Excludes Observations that spanned multiple years

Pre 197051
19700
19710
19720
19730
19743
19752
19763
19770
19783
19792
19802
19811
19821
19833
19841
19850
19861
19870
19881
19891
19900
19911
19921
19930
19941
19952
19962
199721
19983
19994
20001
20014
20024
20030
20041
20050
20062
20074
20081
20093
201034
201115
20123
201312
20145
201522
20167
20179
20186
20190
20200
20210
Total243