*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701250114122
1970000044
197100001010
1972000077
1973001078
1974101068
1975001067
19760010910
197700201012
19780010910
197900101112
198002101013
198100001414
198200301619
1983002079
198401401015
1985020079
198601301822
1987021702140
1988021502037
1989062101946
1990123101439
199114701224
199214601627
19932131901953
199416924020114
19953111821953
1996149141974
1997229126020177
1998448136015203
1999034132015181
2000136161024222
200106121021148
20020211108121
2003013136013162
200403146021170
200514135019159
200635242015265
200707166124198
200829107116135
2009031133027191
2010353176033265
2011031138135205
20125171408585674
2013728576641941256
2014330181672601387
201512399989132301643
201694471204204162096
2017145081416254892452
2018155241592324272590
201911497166894872672
2020041129371496
2021020013
2022000000
Total104364011305130371018889