Since the first website debuted 20 years ago, the internet has become a daily reality for nearly a quarter of the world’s population, revolutionizing the way we work, socialize, create, and share information. In an attempt to quantify how much the internet is worth, a new report from McKinsey Global Institute focused on the online economies of the G-8 countries, plus those of China, India, South Korea, Sweden, and Brazil. McKinsey slotted internet activities into four categories: Private consumption, private investment, public expenditure, and trade. Here, a by-the-numbers look at the "internet economy":