*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970003003
1970000000
1971002002
1972001012
1973004015
1974003003
1975004004
1976003003
1977003003
1978000000
1979007007
1980005005
1981014005
1982003003
1983005005
1984004004
19851540010
19861790017
198723150020
198821120015
19891280011
1990121130035
1991410230037
199243270135
199348310043
1994217400059
199537410051
1996512260144
1997110370149
1998115300046
199905220027
200014300035
200126450053
200204490053
200306520058
200407480055
200528640074
200606770083
200711780080
200805840089
20090410200106
20101519100197
20111316700171
201212924800278
201311027000281
201421122400237
201551134600362
201631533600354
201742144600471
201871951200538
2019151758400616
202042975602791
20211971001721
202241576100780
202301130014
202400110011
Total873736593087061