*Excludes Observations that spanned multiple years

Pre 197013
19700
19719
19721
19730
19742
19752
19762
19770
19780
19791
19801
19810
19820
19830
19843
198565
1986102
1987193
1988486
1989101
199025
1991243
1992119
1993634
1994341
1995317
1996218
1997182
199829
1999179
2000144
2001147
200259
200351
200478
200554
200636
200739
200838
200935
201054
201158
201267
201361
201462
201562
201657
201762
201851
201942
202032
202140
202223
Total4620