*Excludes Observations that spanned multiple years

Pre 197037
19700
19710
19720
19730
19742
19752
19762
19771
19781
19793
19801
19813
19822
19832
19840
19850
19861
19870
19880
19890
19902
19914
19922
19930
19946
19954
19961
19976
19986
19997
20000
20012
20020
20037
20045
20053
200660
200732
200851
200946
201058
2011147
2012241
20135
201495
201529
201643
201715
201820
20199
202011
202119
202216
20236
20240
Total1015