*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19700050102107
1970000033
197100001010
1972000077
1973000066
1974001056
1975001089
197600301215
197700101213
197800101011
197900601622
198000201416
198100302023
198200401923
198300201618
198400201921
198500302124
198600402226
198700902534
198800302124
198900202022
199000311822
1991002131943
1992001102233
199300802432
1994001412742
1995001712341
1996003001949
1997001512339
1998002502550
199900902029
2000001102738
2001001503247
2002002901746
2003002001737
2004001302639
2005001302538
2006002712755
2007001622947
2008003032457
2009001702845
2010002403054
20110057050107
20120064057121
201300106235143
201400123069192
2015001630117280
2016001520125277
2017002141153368
2018003041120425
2019003626151519
2020004691143613
2021003601189550
2022001712139312
2023002002
2024005038
Total0029722722415240