*Excludes Observations that spanned multiple years

Pre 1970178
19706
19711
19721
19730
19743
19751
19763
19774
19781
19793
198017
19812
19821
19831
19841
19851
19861
19870
19880
19890
19902
19910
19921
19933
19945
19955
19966
19973
19988
19992
20002
20015
20025
200319
200426
200510
200627
20075
200825
200930
201039
201110
201213
201310
20149
201514
20166
20174
20183
20195
20206
20218
20225
20233
20240
Total549