*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000202325
1970001001
1971000033
1972000033
1973000022
1974000033
1975000033
1976001023
1977002068
1978000022
1979000044
1980001056
1981000055
1982002057
1983002035
1984002046
1985012148
1986004059
19870260513
198800100313
19890230712
19900840618
1991110141632
199214281456
19931782309111
1994332738011379
199532723639323
199603024107350
19970695709135
19981285508299
199901760831
2000019916013228
2001013315014162
2002117120214208
200301188111138
2004018310010203
20050332611272
200619825112137
2007017725011213
20080623523102
200905290539
20100438503131
20110010305108
201202500759
20130110300104
201403610064
201502170827
2016008008
2017000000
Total122645906133023878