Add correct classes to vertical text
Add correct classes to vertical text

Verticals with "Not provided" data should have the class
`.stat-value-na`. Added some logic to determine is the value is provided
and change the class. Also refactor to use an each statement to build
out stat-values.

wearefuturegov/opendata,wearefuturegov/opendata,wearefuturegov/opendata