*Excludes Observations that spanned multiple years

Pre 197060
19700
19710
19720
19730
19741
19755
19762
19776
19781
19793
19803
19811
19820
19833
19842
19858
198614
198713
198837
198938
1990353
199156
199219
199311
19948
199559
199616
1997849
1998144
1999164
20001837
20012064
20021522
20035327
20041612
20053067
20061166
20071179
20081122
20093299
20102421
20111119
2012579
2013514
2014494
2015679
2016870
2017813
2018126
Total31686