*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000404
1970000505
1971000101
1972000000
1973000101
1974000101
1975000101
1976000404
1977000404
1978000303
1979000516
1980000707
1981000707
1982000606
1983000404
1984000202
1985002305
19860008412
19870008210
19880008412
1989002151027
1990003142340
1991005181437
199200114924
1993000262349
1994001504293
1995003333167
1996003613498
1997000574097
19980006834102
19990007333106
20000008820108
20010001167123
20020001155120
20030011302133
20040031653171
200500112214137
200600013821159
200700313021154
200800114850199
200900716377247
201000317490267
201100213447183
20120014269112
201300588136229
20140017961141
2015000201535
201600245451
2017000415
2018000000
Total005024129473409