According to government data, about two million of the country's population (less than 50 million) have Internet addiction problem, and approximately 68,000 10–19-year-old teenagers are addicted to the Internet, accounting for roughly 10% of the teenage population.[120] Even the very young generation are faced with the same problem: Approximately 40% of South Korean children between age three to five are using smartphones over three times per week. According to experts, if children are constantly stimulated by smartphones during infancy period, their brain will struggle to balance growth and the risk of Internet addiction.[121]