*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970002002
1970000000
1971002002
1972001012
1973003014
1974002002
1975003003
1976002002
1977003003
1978000000
1979006006
1980005005
1981015006
1982004004
1983006006
1984004004
19851540010
19861790017
198723150020
198821130016
19891280011
1990121130035
1991410240038
199243270135
199338390050
1994217450064
199537440054
1996512260144
1997110390151
1998115390055
199905250030
200014350040
200126500058
200204560060
200306590065
200407570064
200528770087
20060610700113
20071110200104
2008059900104
20090411100115
20101519600202
20111317700181
201213035300384
201311145600468
201431356400580
201571376300783
201641884200864
201752495200981
20189211151001181
201917261244001287
2020011024
2021000000
2022000000
Total863437870078306