*Excludes Observations that spanned multiple years

Pre 197072
1970181
1971163
1972195
197352
197493
1975105
197653
197774
197893
197924
198035
1981124
198242
198329
198471
198540
198617
19875
1988152
1989168
1990157
1991161
1992133
1993639
1994355
1995306
1996183
1997145
1998115
1999203
2000330
2001225
2002222
2003105
200432
2005100
2006179
2007267
2008158
2009108
2010119
2011117
2012106
2013149
201479
201535
201644
201738
201849
201973
202046
202137
202262
202330
20240
Total6895