Category
Group
Subgroup
NameYears of accessibilityData accessibility levelDescription
 total 2003-2015NTS-2-
 0 - 9 2003-2015NTS-2-
 10 - 49 2003-2015NTS-2-
 50 - 249 2003-2015NTS-2-
 250 and more 2003-2015NTS-2-