*Excludes Observations that spanned multiple years

Pre 19700
19700
19710
19720
19730
19744
19750
19760
19771
197823
19794
19805
19817
19826
198311
19845
19854
19863
19875
19884
19890
19901
19910
19920
19931
19944
199517
19965
199716
199815
199916
200084
200120
200214
200357
200456
200531
200663
200710
200814
200916
201045
2011102
201210
201316
201414
20150
20160
20170
Total709