Previously, the gross domestic product growth was estimated at 0.7%.
The GDP for 2012 was 586.75 billion lei (EUR131 billion) in current prices, according to semi-definitive data from the INS.
The revision was mainly due to lower-than-estimated output in agriculture and information and telecom industry. The activity in real estate, financial intermediation and insurance and the public administration was also revised down. On the other hand, increases were noted in constructions, retail and tourism industry, the statistics institute said in a news release.
In the first nine months of 2013, the Romanian GDP rose at an annualized rate of 2.7%, according to the latest INS estimations.