Stockholm - After two years in office, Sweden's centre-right coalition trails the opposition by over 15 per cent, according to a new survey published Tuesday.

Prime Minister Fredrik Reinfeldt's four-party coalition has dropped from 48.2 per cent to 38.8 per cent, according to the Synovate poll commissioned by the Dagens Nyheter newspaper.

Reinfeldt was slated to outline his government's policies later Tuesday during the formal opening of parliament after the summer recess.

In an op-ed piece in Dagens Nyheter's Tuesday edition, Reinfeldt and the leaders of the other three parties in his coalition unveiled plans to slash income taxes by 15 billion kronor (2.2 billion dollars) as of 2009.

The government also planned to cut corporate taxes, they said.

The Synovate poll suggested that one of the coalition parties, the Christian Democrats were on 3.7 per cent, insufficient to clear the 4-per-cent hurdle to enter parliament.

The poll said the opposition Social Democrats, the Left Party and Greens had increased from 46.1 per cent in September 2006 to 56.4 per cent.

Some 3,900 voters were polled by telephone August 18 to September 11.

The Social Democrats, who last year elected Mona Sahlin as their first female leader, have recouped some 350,000 voters compared to 2006, Synovate said. (dpa)