*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 1970017008
1970002002
1971010001
1972000011
1973001001
1974213006
1975010001
1976031004
1977001001
1978012003
1979020002
1980000000
1981010001
1982003003
1983021014
1984020013
1985022004
1986009009
19870460010
19880490013
198936190028
1990416130033
199146150025
199210128700109
199383011000148
199487219600276
199583517302218
199623412800164
199710484300101
199852512000150
1999221280051
200074716000214
20014179201114
200232814700178
2003193614300198
200434527300321
200553711900161
20064389600138
200754013600181
200839015200245
200922111000133
20101010216902283
201127612200200
2012111688800267
20131927212100412
20142028716000467
20152041422400658
20161848829700803
20172540521600646
20182938221700628
20193037826400672
20201244035300805
20211949131900829
20221049924600755
202313200024
202400110011
Total347513452340810723