The PlayStation 2's current market trend is something like this, according to VG Chartz:
2000: ~5,500,000
2001: ~16,000,000
2002: ~22,000,000
2003: ~17,750,000
2004: ~16,000,000
2005: ~17,250,000
2006: ~12,000,000
2007: ~9,500,000
The drop-off has been significant, but sales were following more or less a set pattern: three years of growth, followed by three mostly stagnant years, now followed by three declining years. 2008's totals will likely be somewhere around 6,000,000 or 7,000,000. The decline should remain pretty consistent:
2008: ~6,500,000
2009: ~3,000,000
2010: ~1,000,000
2011: ~250,000
This would fit more or less with the trends that products tend to follow. And of course, this is assuming that the system isn't discontinued before 2011 (which it may well be). That would leave the PS2 at lifetime sales of around 130 million sold to consumers.
Sky Render - Sanity is for the weak.
