*Excludes Observations that spanned multiple years

  B
b
t
W
w
 
Pre 197049002051
19702009314
1971100416
1972300205
19733007010
1974300609
1975500005
1976500005
1977401128
1978600208
1979700108
1980500016
19815009014
1982500409
1983800109
1984500106
19859000211
1986800109
19876008115
1988100030242
1989100016531
199070031543
19911102261150
199260327743
19931003401063
1994120611258188
1995101120426242
199670123135274
199714065963142
199810021427161
19991500382275
2000210214420187
2001140375395
200215001683186
2003180270797
200414011545174
2005130147970
20061402651091
2007120178899
20089226721101
200960335044
2010001572179
2011303412572
2012210121530
201300152356
201400339143
201500111012
2016100113
2017001102
2018000000
Total40345221314133003