*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197000110112
1970000055
197100001313
1972000044
1973000033
1974000011
1975000022
1976000101
19770002810
1978000584199
197900013031
198000003030
198100012122
198200001717
1983000077
1984000077
1985000022
19860003912
1987000055
198800001818
198900011819
199000012627
199100023032
199200023537
199300014647
199400054954
199500145156
1996001102839
1997002206587
199800143641
199900151117
200000045660
200100038184
200200015115130
200300334105142
200400032274306
200500127128156
200600011109120
20070007280287
20080028147157
20090011198110
201000015141156
201100020420440
201200025471496
20130006117123
201400008888
2015000358
2016000606
2017000000
2018000000
Total001435832543626