*Excludes Observations that spanned multiple years

Pre 197019
197012
19712
19722
19734
19744
197516
19762
19772
19784
197938
198028
198179
198250
1983137
1984325
1985219
1986165
1987177
1988157
1989169
1990167
1991140
1992152
1993137
1994137
1995170
1996163
1997126
1998156
1999165
2000137
2001154
2002170
2003161
2004118
2005154
2006112
2007161
2008262
2009125
2010109
201172
201278
201371
20142
20150
20160
20170
Total5010