That would explain the abrupt drop of otherwise high Chinese, Spanish and mestizo, percentages across the country by the time of the first American census in 1903. Manila's population increased dramatically since the 1903 census as the population tended to move from rural areas to towns and cities. In the 1960 census, Manila became the first Philippine city to breach the one million mark (more than 5 times of its 1903 population). The city continued to grow until the population somehow "stabilized" at 1.6 million and experienced alternating increase and decrease starting the 1990 census year. This phenomenon may be attributed to the higher growth experience by suburbs and the already very high population density of city. As such, Manila exhibited a decreasing percentage share to the metropolitan population from as high as 63% in the 1950s to 27.5% in 1980 and then to 13.8% in 2015. The much larger Quezon City marginally surpassed the population of Manila in 1990 and by the 2015 census already has 1.1 million people more. Nationally, the population of Manila is expected to be overtaken by cities with larger territories such as Caloocan and Davao City by 2020.