*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197001801726
1970001001
1971000000
1972000000
1973000000
1974001001
1975002013
1976002002
1977002002
1978000011
1979000011
1980001012
1981003025
1982000000
1983000000
1984001012
1985000011
1986011002
1987001012
1988003025
198900100010
1990004015
19912180011
199230170020
199331170122
199454230133
199563240437
199661230131
199712140118
199810200021
199921150119
20001090212
2001113350049
200274700081
200344160125
200416400451
2005308191563
200614240231
2007218300353
20081390013
2009017008
201001170119
201102110114
2012112170232
2013316210040
2014432250061
2015023260352
2016315260044
2017420370162
2018129350065
2019428390071
2020230290465
2021021330559
2022129280260
2023015017
20240550010
Total1003408141751330