if the evil of prostitution remains in all its gravity. Dissent Roderick Hindery reported that a number of Western Catholics have voiced significant disagreement with the church's stance on contraception. Among them, dissident theologian Charles Curran criticized the stance of Humanae vitae on artificial birth control. In 1968, the Canadian Conference of Catholic Bishops issued what many interpreted as a dissenting document, the Winnipeg Statement, in which the bishops recognized that a number of Canadian Catholics found it "either extremely difficult or even impossible to make their own all elements of this doctrine" (that of Humanae vitae). Additionally, in 1969, they reasserted the Catholic principle of primacy of conscience, a principle that they said should be properly interpreted. They insisted that "a Catholic Christian is not free to form his conscience without consideration of the teaching of the magisterium, in the particular instance exercised by the Holy Father in an encyclical letter". Catholics for Choice stated in 1998 that 96% of U.S. Catholic women had used contraceptives at some point in their lives and that 72% of U.S. Catholics believed that one could be a good Catholic without obeying the church's teaching on birth control. According to a nationwide poll of 2,242 U.S. adults surveyed online in September 2005 by Harris Interactive (they stated that the magnitude of errors cannot be estimated due to sampling errors, non-response,etc.), 90% of U.S. Catholics supported the use of birth control/contraceptives. A survey conducted in 2015 by the Pew Research Center among 5,122 U.S. adults (including 1,016 self-identified Catholics) stated 76% of U.S. Catholics thought that the church should allow Catholics to use birth control. Eastern Orthodoxy An official document of the Russian Orthodox Church prohibits contraception except when it is specifically approved by a confessor, does not involve the possibility of aborting a conceived child, is for reasons of inability to raise a child, and is done with spousal consent. Eastern Orthodox believers, on all sides of the issue, tend to believe that contraceptive acceptance is not adequately examined, and that any examination has too often become tied up in identity politics, the more accepting group accusing the categorically opposed group of Roman Catholic influence. Many Orthodox hierarchs and theologians from around the world lauded Humanae vitae when it was issued. Among these Orthodox leaders, some teach that marital intercourse should be for procreation only, while others do not go as far and