*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000101
1970000000
1971000000
1972000000
1973000101
1974000000
1975000101
1976000101
1977000000
1978000000
1979000101
1980000303
1981000202
1982000606
1983000101
1984000101
1985000101
1986000628
19870009211
1988000437
19890007714
199000151622
19910009817
199200211417
1993003131632
1994002192950
1995005121128
199600382233
199700484759
1998001105162
1999000112536
2000000143751
200100494962
2002000136477
200300025101126
200400024106130
20050012187109
20060005597152
20070004980129
20080006452116
2009000422466
20100029973174
201100014419163
20120015948108
201300144752
2014000462167
201500013518
2016000145
2017000123
2018000000
Total003087411192023