*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970001001
1970001001
1971001001
1972000000
1973001001
1974001001
1975002002
1976003003
1977003003
1978012003
1979005005
1980004004
1981001001
1982006006
1983002002
1984005005
1985006006
19860380011
19870370010
1988035008
19890690015
199011490024
1991210240036
199234140021
1993315210039
1994351370091
1995351260080
1996643200069
1997748180073
1998268190089
1999032120044
20005753300113
2001146190066
2002055350090
200311142400139
200411472300171
2005155360092
20061825200135
20070786500143
20081806300144
2009211840097
201044516300212
201103512000155
2012036210057
201323780083
2014114540069
201503110014
2016012003
2017000000
Total5012321156002438