China creep

I randomly selected a few countries and compared where their imports came from in 2001 and in 2006. The 2001 numbers came from this old version of the CIA World Factbook. The 2006 numbers came from the current factbook.

In some cases, China's share of imports came from nothing in 2001. America's share usually drops, too. This is just over a period of 5 years. Growth of imports masks the full story, it is possible that American and EU revenues from exports to these countries stayed the same or even grew, but...China's revenue grew much faster.

Imports:

Iran

$17.2 billion (f.o.b., 2001 est.)
Germany 11%, Italy 8.3%, China 6.1%, Japan 5.3%, UAE 5% (1999)

$45.48 billion f.o.b. (2006 est.)
Germany 12%, China 10.5%, UAE 9.4%, South Korea 6.2%, France 5.6%, Italy 5.4%, Russia 4.5% (2006)

Canada

$238.3 billion (f.o.b., 2001 est.)
US 74%, EU 9%, Japan 3% (2000)

$353.2 billion f.o.b. (2006 est.)
US 55.1%, China 8.7%, Mexico 4% (2006)

Brazil

$57.7 billion (f.o.b., 2001)
US 23.2%, Argentina 11.2%, Germany 8.7%, Japan 5.5%, Italy 3.9% (2001)

$91.4 billion f.o.b. (2006 est.)
US 20.5%, Argentina 8.2%, China 7.9%, Germany 7.5% (2006)

South Africa

$28.1 billion (f.o.b., 2001 est.)
EU 41%, US 11.4%, Saudi Arabia 7.3%, Japan 7% (2001 est.)

$61.53 billion f.o.b. (2006 est.)
Germany 12.6%, China 10%, US 7.6%, Japan 6.6%, Saudi Arabia 5.3%, UK 5% (2006)