美國抽煙死亡率統計來自CDC和更新的統計：
According to the U.S. Surgeon General CDC, about 480,000 Americans die of smoking-related causes each year, but that figure may be closer to 540,000, researchers from the American Cancer Society report.
世界衛生組織：Tobacco in China
There are more than 300 million smokers in China, nearly one-third of the world's total.
About one in every 3 cigarettes smoked in the world is smoked in China. Nearly 2.3 trillion cigarettes were consumed in China in 2009 – more than in the other top-4 tobacco-consuming countries (Indonesia, Japan, the Russian Federation and the United States of America) combined.
According to the Global Adult Tobacco Survey (GATS) in China in 2010, nearly one-third (28.1%) of the population smokes, including 52.9% of men and 2.4% of women. More than half (52.7%) of smokers aged 20-34 years started smoking daily before the age of 20.
Approximately one million deaths every year in China are caused by tobacco – around one in six of all such deaths worldwide.
把上述統計除以美，中的人口基數，就得到每十萬人中抽煙死亡率。如果用抽煙人數作為基數，中國人的抽煙死亡率比美國更低了，因為中國人的抽煙人口是28%，美國是18%。
世界衛生組織和美國CDC是怎樣統計的？我相信方法上類似。
"最新統計，美國每年抽煙至死率為每十萬人中169人，中國每年抽煙至死率為每十萬人中72人。 美國抽煙至死率比中國高一倍以上。"
