*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000501015
1970000000
1971000000
1972000000
1973000011
1974001001
1975001001
1976000011
1977001012
1978002013
1979001012
1980000011
1981001012
1982001034
1983002013
1984001045
1985002002
1986004015
1987005005
1988004015
1989004026
1990003003
199100120012
19920080210
1993004048
1994007007
199500150116
199600110011
199700130215
1998009009
19990090514
2000007007
20010090312
200200110011
200300150217
2004007018
20050090110
200600120012
200700110112
200800170118
200900330134
201000170219
201100430144
201200350641
201300730275
201400590766
201500780381
20160092014106
20170012501126
20180015304157
20190010407111
202000120013133
20210012905134
202200129019148
2023004004
2024006006
Total00142401371561