To bring up the accurate stats from the Australian study (PDF link) as they're often misrepresented regarding the '1 in 6' stat -
"Six survey items were used to determine if men had any sexual feelings towards people below the age of 18 years. These were:
- Has sexual feelings towards people below the age of 18 years (3.4%);
- Would have sexual contact with a child between 12 to 14 years if no one would find out (5.7%);
- Would have sexual contact with a child between 10 to 12 years if no one would find out (4.6%);
- Would have sexual contact with a child younger than 10 years if no one would find out (4.0%);
- Has concerns about sexual feelings towards people below the age of 18 years (4.5%);
- The lowest age they typically find attractive is under 18 years (5.7%)."
So, the '1 in 6' includes under 18s. But 4% of men would have sexual contact with a child younger than 10 - the relevant aspect for nursery. Which gives us 4 out of 100. But -
"Men with sexual feelings towards children who have offended against children [...] are almost one in twenty men in the Australian community" and they "had 2.73 greater odds of working with children compared to men who did not have sexual feelings or offending with children."
In addition, "Men with sexual feelings who wanted help were more than twice as likely to work with children compared to men with sexual feelings who didn’t want help."
So let's make both those who have offended, and those who have (yet) but have paedophiliac feelings, combined at 6 times more likely.
I'm not great with numbers (so correct me if I'm wrong), but I think that means that statistically speaking, 24% of men working with children have sexual feelings for children, with approximately 10.92% having already offended sexually against children.
That seems worryingly high - have I gone wrong somewhere with my maths?