*Excludes Observations that spanned multiple years

Pre 19709
19702
197111
19721
19730
19740
19751
19760
19775
19786
19792
19805
19810
19824
19830
19843
198590
1986120
1987223
1988720
1989106
199058
1991327
1992224
1993663
1994340
1995482
1996336
1997244
199853
1999139
2000142
2001137
2002105
200358
2004105
200565
200638
200748
200882
200978
201081
201196
201294
2013108
2014106
201593
201688
2017101
201859
201939
202015
202170
202276
20238
Total6066