How does this compare to the PS2 and Wii in the same timeframe?
1) ps2 ltd shipped (2000-03-31) - 1.41 million
2) ps2 ltd shipped (2000-06-30)
3) ps2 ltd shipped (2000-09-30) - 3.52 million
4) ps2 ltd shipped (2000-12-31)
5) ps2 ltd shipped (2001-03-31) - 10.61 million (note: staggered launch, so we can't do a 1:1 comparison)
6) ps2 ltd shipped (2001-06-30)
7) ps2 ltd shipped (2001-09-30) - 19.58 million
8) ps2 ltd shipped (2001-12-31)
9) ps2 ltd shipped (2002-03-31) - 24.99 million
1) wii ltd shipped (2006-12-31) - 3.19 million
2) wii ltd shipped (2007-03-31) - 5.84 million
3) wii ltd shipped (2007-06-30) - 9.27 million
4) wii ltd shipped (2007-09-30) - 13.17 million
5) wii ltd shipped (2007-12-31) - 20.14 million
6) wii ltd shipped (2008-03-31) - 24.45 million
1) ps4 ltd shipped (2013-12-31) - 4.5 million
2) ps4 ltd shipped (2014-03-31) - 7.5 million
3) ps4 ltd shipped (2014-06-30) - 10.2 million
4) ps4 ltd shipped (2014-09-30) - 13.5 million
5) ps4 ltd shipped (2014-12-31) - 19.9 million
6) ps4 ltd sell-through (2014-03-01) - 20.2 million (note: january and february only, and it's sell-through, not shipments)