http://www.bp.com/liveassets/bp_interne ... t_2011.xls
If you look under the coal consumption tab the unit of measurement is Mtoe or "Million Tonnes of Oil Equivalent".
The US has remained relatively stable over the last decade and has even decreased consumption the last few years, we're around 500 Mtoe which is about 1 billion tons of coal. I'd attribute that mostly to the economic downturn and the increased use of NG.
China has increased usage from 730 Mtoe in 2000 to more than 1700 Mtoe in 2010, thats an increase of 2 billion tons in a decade and roughly 3.5 billion tons total. It's almost 4 times what we consume. This is almost half the coal consumed worldwide.
Even more interesting under the reserves tab and the R/P ratio column.
Reserves-to-production (R/P) ratio - If the reserves remaining at the end of the year are divided by the
production in that year, the result is the length of time that those remaining reserves would last if
production were to continue at that rate.
If they were to not increase production they have 35 years left. The US under same scenario has 241 years.