*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 19701070210
1970002002
1971001001
1972001001
1973004004
1974002002
1975002002
1976004004
1977008008
1978104005
1979002002
1980006006
1981005005
1982004004
1983004004
1984004004
1985007007
1986008008
198700160117
198800140014
198900150015
19902580015
199141290034
199200250025
199300280028
199400560056
199501480049
199600370138
199700380038
199800400040
199900460046
200001620063
200112700174
200200690069
200301770280
200403880091
200512920196
20060213000132
20070313600139
20081716200170
20092420101208
20101628800295
20110025901260
201201840402424
20130056601567
201424461300659
20150077400774
20160091202914
2017011181011183
2018001261011262
2019031537011541
2020011772011774
2021121923001926
2022011556001557
202301200021
202401120013
Total171101464001914786