*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970003003
1970001001
1971000000
1972000000
1973000000
1974000000
1975002002
1976003003
1977003003
1978001001
1979001001
1980001001
1981013004
1982011002
1983000000
1984001001
1985001001
1986030003
19870490013
1988026008
19890890017
199013220035
1991120110032
199223280042
199301111500126
199421322000154
199511332000154
199631511400168
199702331900252
19982185600193
199901151600131
200002283900267
200133441801366
200201623100193
200313972900427
200403761800394
200522466701316
200611914100233
200701385300191
200801416200203
200911407100212
2010110814100250
201115015900210
201201296000189
2013061330094
20141618600148
2015011210032
20160790016
2017010001
Total2339541114025093