The ambulances helped in 55,790 pregnancy-related cases and 16,230 trauma cases, according to data released by the government.
Of the total emergency calls attended, 88 percent were in rural areas, it said.
The state government hired the GVK-EMRI (Emergency Management Research Institute), a Hyderabad-based company, to run the ambulance service.
The project is jointly funded by the National Rural Health Mission and the state government.
Chief Minister Virbhadra Singh July 16 flagged off 60 more ambulances, which joined the existing fleet of 112 ambulances.
All the 172 ambulances have life-saving equipment and drugs like anti-snake bite venom.
An ambulance takes 19 minutes to reach a needy person in urban areas and 39 minutes in the rural areas, said officials.
"On an average, 3,200 phone calls are received everyday at the 108 emergency management centre," said an official.
The ambulance service was launched by former chief minister Prem Kumar Dhumal Dec 25, 2010.
--IANS (Posted on 18-08-2013)