@picnoir "See Methodology for details" is the opposite of evasive.
pewresearch.org/religion/2018/…
"The surveys in Western Europe were conducted using landline and mobile telephone from April to August 2017 in 12 languages with a nationally representative sample size of about 1,500 or more adults in each country. More details on the methodology used in these countries, including margins of error and sample sizes, can be found here."