*Excludes Observations that spanned multiple years

Pre 197078
19701
19711
19720
19731
19743
19756
19764
19774
19783
19794
198018
19815
19826
19839
198417
198598
198696
198797
198886
1989113
1990196
199188
1992110
1993170
1994172
1995342
1996118
1997596
1998850
1999758
20004775
20011252
20021076
20039735
200413254
20053341
20062158
20072355
20082421
20099211
20102102
20113205
20123308
20132080
20143176
20152898
20162389
20172292
20181310
2019569
20200
Total76957