*Excludes Observations that spanned multiple years

Pre 19701
19700
19710
19720
19730
19745
19750
19760
19771
197821
19794
19805
19817
19827
19836
19844
19852
19864
19875
19887
19890
19901
19910
19922
19931
19945
19956
199615
199723
19989
199917
200030
200116
200213
200358
200451
200524
200661
20076
200815
200917
201040
201168
201213
201315
201416
201517
20168
20170
20180
Total626