Financial Times: 1.5%

Over fifty years of studies have shown that repeated discrimination changes the way people behave. If a group in society are told again and again that they are less valuable, they are likely to be less ambitious and to underachieve academically or in the workplace. That robs the economy of human capital it would otherwise have had.
A 2011 US study suggested that lesbian, bisexual, gay and transgender employees who felt unable to be honest about their sexual orientation were far less likely to reach positions in senior management. Even relatively tolerant Sweden found that homosexual men are 1.5 per cent less likely to hold a professional position when compared to equally qualified heterosexual men. 

Financial Times, 'Same Sex marriage boosts the economy'!

Really?
1.5% in Sweden, you say.
As much as that?
How very interesting.
And have you factored in the usual margin of error?