*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700670013
1970000000
1971080008
1972000000
1973020002
1974020002
1975110002
1976001001
1977012003
1978011002
1979101002
1980000000
1981001001
1982001001
1983000000
1984010001
1985014005
1986035008
19870280010
19880380011
19890290011
199001320015
199111040015
199215060057
1993082100092
19942901800110
1995069130082
199607760083
1997143150059
19980991000109
199902970036
2000173150089
2001062170079
2002072130085
2003167170085
200421031800123
20051881900108
2006181170099
20070775400131
20080703600106
2009228310061
20100336900102
2011021600081
20123929400189
201321679300262
2014719314400344
2015129218000473
2016431521000529
2017735022600583
2018643624700689
2019642224700675
202001900019
2021020002
2022000000
Total5136581946005655