What is the most-played soccer game on the PS2?

I’m not sure if this is the case globally—which is why I’m asking—but where I live, and across the entire continent, the most legendary PS2 soccer game was PES 6 (or PES 2006). It was the most played and most beloved title—*Pro Evolution Soccer 6*. Although better versions were released—I believe they went all the way up to PES 13—*PES 6* remained the most popular and widely played. Was it the same for you? Where you live, was that the most played soccer game on the PS2, or was it a different one?