*Excludes Observations that spanned multiple years

Pre 197036
19701
19711
19723
19730
19741
19752
19762
19773
19780
19794
19802
19811
19821
19833
19840
19852
19868
198721
1988111
19897
199010
199162
199266
1993118
1994186
1995144
1996128
199776
199811
19995
20004
20016
200219
200333
200454
200547
200652
200758
200896
200971
201070
201149
201244
201352
201440
201545
201659
201758
201826
201936
202034
202151
202256
202312
20241
Total2088