A report by international financial firm Citigroup states that while tobacco use is on the decline in both the UK and USA, the addictive substance still causes 5.4 million deaths globally each year, which translates to an average of one person perishing to tobacco every six seconds.
http://www.telegraph.co.uk/finance/newsbysector/retailandconsumer/8246377/Tobacco-facts-ten-things-to-know-about-smoking.arhtml
http://www.dailymail.co.uk/health/article-1345289/Smoking-vanish-Britain-2050-suggests-Citigroup.html