*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970000022
1970000000
1971000000
1972000000
1973001001
1974001001
1975000000
1976002002
1977502007
19788030011
197912240018
1980301004
19818330014
19824160011
1983630009
19846280016
19855150011
19867490020
198753120020
198883120023
1989106280044
199056202500101
19916774600120
19926374500115
199398919800305
1994421716000219
199529413100164
1996111011600137
199720412600150
19981020680098
1999116520170
200018138300114
20013037600109
200226313400163
200317211901139
20049118100101
2005549100100
200627212200151
200729713600172
2008321318400229
2009825919700338
2010664328800397
2011281326100302
201283187800179
2013683511200215
201477396300179
20159096600165
20168911300103
20179410800112
2018813110095
2019101230034
20201096300118
2021202004
Total15664273215045212