According to the 2003 census conducted by the Oman Ministry of National Economy, the population of Muscat is over 630,000, which included 370,000 males and 260,000 females. Muscat formed the second largest governorate in the country, after Al Batinah, accounting for 27% of the total population of Oman. As of 2003, Omanis constituted 60% of the total population of Muscat, while expatriates accounted for about 40%. The population density of the city was 162.1 per km.