With seven weeks to go before the March 15 general election, 70% of voters still have no idea who to vote for, the AD said on Thursday.

Parties are becoming more similar and voters are taking longer to make up their minds about who to support, the paper said. There are 150 seats in the lower house of parliament.

‘A lot can change in the way the seats are divided up in the coming weeks,’ Tim de Beer of research group Kantar told the paper.

There are several organisations carrying out opinion polls, all of which indicate at least half of voters are still undecided. Just 28% of those polled by I&O Research say they have definitely made up their mind about who to back.

Pollster Maurice de Hond says he estimates around one in five voters have no idea at all about who to vote for. ‘They will probably end up not voting at all,’ he said.

In the last election in 2012, nearly two in five voters made up their minds who to support in the last week of the campaign.