Quoting from a non-Catholic, anti-Catholic site, I see.
This is a poor but typical attempt to blithely dismiss evidence you do not like. As said above, the sources are many and the stats are overall consistent, and are sometimes quoted by Catholic outlets, and or come from some. If you dispute it, go find comparable stats that show the opposite.
This is part of a larger work . See the whole of it here: http://peacebyjesus.witnesstoday.org/RevealingStatistics.html
The original post, describing the bible reading in El Salvador, reeks with the mendacity usually served in these anti Catholic threads. Notice how once challenged regarding the validity and misleading nature of their duplicity these anti christian bigots fall to support their mendacious contentions which fall like lightning from the sky. These alleged Christians have used pagan tactics for years but as Christ commanded we must love all.