Which of the following is true according to the passage?

Just one extra year of schooling makes someone 10% less likely to attend a church, mosque or temple, pray alone or describe himself as religious. Changes in the compulsory school-leaving age in 11 European countries between 1960 and 1985 tease out the impact of time spent in school on belief and practice among respondents to the European Social Survey. By comparing people of similar backgrounds who were among the first to stay on longer, the authors could be reasonably certain that the extra schooling actually caused religiosity to fall, rather than merely being correlated with the decline. A paper, published earlier this year, showed that after Turkey increased compulsory schooling from five years to eight in 1997, women’s propensity to identify themselves as religious, cover their heads or vote for an Islamic party fell by 30% -50%. The most recent paper also showed that each extra year in the classroom led to a drop of 11 percentage points in superstitious practices, though these remain common. Two-fifths of respondents said they consulted horoscopes, and a quarter thought that lucky charms could protect them. Other research has shown that religious beliefs and practices seem to make people happier, and in some circumstances healthier and wealthier, too.