February 2014 – NJ, IL
System updates (1)

January 2014 – CA, AL, AZ, AR, IN
System & Security updates (2)

December 2013 – CT, VT, MI, WI
System updates (2)

November 2013 – ME, NY, PA, OH
System updates (3)

October 2013 – CO, NM, UT, WY, ND, LA, OK, TX, FL, AL, GA, TN
System & Security updates (2/1)

October Update – States updated from this point will have NGV Station History charts included in the Stations tab.