*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970004105
1970000000
1971000000
1972000000
1973000000
1974000000
1975000000
1976000000
1977000202
1978000000
1979000303
1980000101
1981001102
1982000101
1983004004
1984002002
1985002002
1986005207
1987004004
1988003104
1989000303
1990000819
1991004217
1992002417
1993000707
1994002428
19950027413
199600314421
199700010111
199800110112
1999000718
200000512017
20010049316
200200011112
200300011112
200400120122
200500016521
200600011112
200700022022
200800020121
200900334340
201000326029
201100837045
2012000808
2013001203
2014000202
2015000101
2016000101
2017000000
2018000000
Total006433132427