*Excludes Observations that spanned multiple years

Pre 197065
19705
19710
19720
19734
19743
19754
19764
19772
19782
197913
198021
19812
19821
19830
19840
19851
19860
19870
19881
19890
19901
19911
19920
19936
19941
19957
19962
19973
19981
19992
20002
20012
200220
200311
2004158
200538
20061
20070
20089
20094
20104
20114
20121
20133
20140
20153
20160
20170
Total412