Pakistan's estimated population in 2015 is over 191.71 million, making it the world's sixth-most-populous country, behind Brazil and ahead of Nigeria. During 1950–2011, Pakistan's urban population expanded over seven fold, while the total population increased by over fourfold. In the past, the country's population had a relatively high growth rate that has been changed by moderate birth rates. In 2014, the population growth rate stands at 1.49%.