Have a look at this News About CNG Prices
According to Zafar Bhutta 
"Consumers will face a 28 to 31 percent hike in gas prices from July 1, as the Oil and Gas Regulatory Authority (OGRA) has allowed the two main gas utilities — the Sui Southern Gas Company Limited (SSGCL) and the Sui Northern Gas Pipeline Limited (SNGPL) — to provisionally increase the gas prices."
For People like us, It is point to think where are we heading towards... Increase is CNG Price in past few months can be seen from this table...
How will we be able to sustain the substantial increasing of prices.