*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000806775
1970000011
1971000033
1972000022
1973000077
1974000000
19750010910
19760010910
197700101516
1978000066
1979000033
198000101213
198100302124
198200401216
1983000044
198400201820
198500402327
198600402024
198700101617
1988000077
198900202426
199000511420
1991001922243
1992001402135
199300711927
19940061714
199500301417
19960021912
199700301417
1998001001121
1999001302235
200000502429
2001001715068
2002002512046
2003002001737
2004001002939
200500601521
200600502126
2007002213356
2008001001626
200900801826
201000111214
2011004904493
2012001250127252
201300115177193
2014002802250
2015001391107247
201600871149237
2017003450136481
2018002152190407
2019002201840
202000181047228
2021004690278747
2022003581297656
2023003003
2024003036
2025000000
Total0023821621824580