Yes, that information for the CIA handbook is out of date. However, I was overoptimistic myself. Churches like those of Dr. Paul Yong-gi Cho were growing so fast in the 1990s, I thought they would have crossed the line by now.
I just checked the 2006 edition of Microsoft Encarta. According to it, South Korea is 41% Christian, 16% indigenous beliefs (which I assume means ancestor worship and homegrown sects like Tongkhak), 15% Buddhist, 11% Confucian, 2% nonreligious and 15% other. Accurate figures are hard to come by because the Koreans take the same spiritual attitude as the Chinese; they consider it okay to belong to more than one religion at the same time.
“I just checked the 2006 edition of Microsoft Encarta. According to it, South Korea is 41% Christian...”
That is cool! I suspect that the toughness of ROK Commandos hasn’t decreased because of it, however. The Talibunnies might want to keep an eye on their backtrail if they really do this. Or even just keep talking about it.