Last year the center collected an average fee of $20 a visit from its clients.
That is about 40 percent above the average fee 50 years ago, the report said.
Terms for the authors vary, but the average fee is about $60,000.
The average fee of those that have made their plans public currently stands at £8,678.36.
The average fees at a half decent private school are about £5,000 per term.
The average fee at these funds last year was an astonishing 0.77 percent.
The average fee this year is 7.6 percent, according to the Pew study.
But the average fee paid to authors of the series is no secret, he said: about $60,000.
The result is an average fee of about 1.25 percent.
The estimated average fee will be around £8,393, it was revealed.