*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197023130018
1970004004
1971030003
1972001001
1973003003
1974012003
1975044008
1976224008
1977009009
1978013004
1979035008
1980014005
1981015006
19820380011
1983006006
1984015006
1985024006
19860780015
198713100014
19880990018
1989016100026
1990049230072
1991415150034
1992313230039
19936803000116
1994131064900168
1995955340098
19961851180087
1997141663600216
199891713800218
199951123500152
200071384000185
200191093500153
200231027500180
200341596200225
200482355700300
2005111378200230
2006913911400262
200771158900211
2008118514400240
2009217813000229
2010214524500311
2011236221300298
20124626918000495
20132630219400522
20142737719300597
20154640323700686
20162852028200830
201739718279011037
201842717361001120
2019367793426001586
202035805526001366
202147982513001542
202235942350001327
202301100314
202450230028
Total963911152780415356