*Excludes Observations that spanned multiple years

Pre 197072
19700
19711
19721
19731
19740
19752
19761
19770
19783
19791
19801
19811
19820
19832
19840
19850
19861
19870
19883
19892
19903
199116
19926
19938
199413
19957
19966
19974
19982
19995
20007
20018
20027
20033
200410
20054
200611
200725
200829
200937
201022
201116
201214
201318
20146
201513
201622
201723
201815
201915
20205
20215
20226
20237
20240
Total490