Iran received access to the Internet in 1993. According to Internet World Stats, , around 69.1% of the population of Iran are Internet users. Iran ranks 17th among countries by number of Internet users. According to the statistics provided by the web information company of Alexa, Google Search is Iran's most widely used search engine and Instagram is the most popular online social networking service. Direct access to many worldwide mainstream websites has been blocked in Iran, including Facebook, which has been blocked since 2009 due to the organization of anti-governmental protests on the website. However, , Facebook has around 40 million subscribers based in Iran (48.8% of the population) who use virtual private networks and proxy servers to access the website. Some of the officials themselves have verified accounts on the social networking websites that are blocked by the authorities, including Facebook and Twitter. About 90% of Iran's e-commerce takes place on the Iranian online store of Digikala, which has around 750,000 visitors per day and more than 2.3 million subscribers and is the most visited online store in the Middle East.