*Excludes Observations that spanned multiple years

Pre 197078
19702
19714
19720
19730
19740
19751
19762
19772
19780
19795
19804
19810
19823
19831
19845
19852
19863
19870
19880
19894
19902
19914
19927
19935
19949
19954
19965
19978
199810
199922
200044
200165
200285
200341
200423
200510
200616
200737
200839
200938
201037
201129
201216
201316
20143
201511
20165
20170
Total707