*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197053270062
1970200002
1971200002
1972200002
1973200002
1974200002
1975200002
1976200002
1977203005
1978101002
19792080010
1980306009
198120100012
19822070110
1983205007
19842080010
198520110013
19862090011
1987205007
198830130218
198940150019
199050250030
199140230128
199250370042
199351250132
199452440152
199551520159
199630560059
199730460251
199840500054
199940410045
200040490053
200160600167
200250580063
20035113800144
200460780488
200551870093
2006419501101
20074011000114
20081013801140
20096023200238
20106025401261
20115127803287
20124012206132
201330620267
201440370142
201550310238
201650220027
201740140119
2018404008
2019009009
2020035008
Total2251323900322660