*Excludes Observations that spanned multiple years

Pre 197019
197010
197113
19726
19732
19745
19751
19760
19779
19784
19790
19803
19810
19820
19835
19841
19850
19868
19870
198891
1989105
199078
1991400
1992234
1993191
1994543
1995467
1996288
1997280
1998353
1999292
2000604
2001408
2002578
200313
20043
20052
200611
20071
20080
20091
201010
20114
20124
20131
20144
20156
20163
20173
Total5064