*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000707
1970000000
1971000000
1972000202
1973000000
1974000101
1975000101
1976000101
1977000303
1978000101
1979000000
1980000112
1981000415
1982001001
1983000000
1984000000
1985001203
1986000000
1987000314
1988000101
1989000404
1990002305
1991003328
19920064010
1993002608
19940017311
1995003609
1996001304
1997001708
1998000505
1999001708
2000001708
2001002417
20020019010
200300118625
200400111012
200500016016
2006001708
200700012214
200800017017
200900331135
201000232034
201100425231
20120009110
2013000808
2014000303
2015000404
2016000101
2017000000
2018000000
Total003829621355