Non-life insurance firms registered a rise of 13 per cent in their collective premium income to Rs 1.70 lakh crore in the financial year ended March, according to data from Irdai. The 34 non-life insurers had a gross premium of Rs 1.51 lakh crore in 2017-18. Among these insurers, as many as 25 are categorised as general insurers, seven as standalone private sector insurers while the rest of the two are government-owned specialised insurers.