Cost of Gasoline in Dominican Republic

I was just checking today the outrageous prices of gasoline in DR.

Today the exchange rate is $37.90 DR pesos to $1 US dollar.
Premium gasoline per gallon costs RDP$204.70 / USD$5.40
Regular Gasoline per gallon costs RDP$193.60 / USD$5.10

And the price keeps going up.

Update to the price of gasoline here. Price of Gasoline Oct. 7, 2011