Turkey's statistical authority, Turkstat, on Thursday announced the results of "Population Projections 2013-2075" research. Elderly population, people who are 65 years of age and over, was 5.7 million in 2012 with a proportion of 7.5 percent in the whole population and this population will reach 8.6 million people with a proportion of 10.2 percent in 2023. The population of Turkey is expected to be 84,247,088 in 2023 and half of the population of Turkey will be over 34 years old the same year. While the population of 60 provinces will increase, the population of 21 provinces will decrease in 2023 compared to 2012 figures. The order of the most populous four provinces will not change. The population of Istanbul, the most crowded city in Turkey will be 16.6 million followed by Ankara which will increase to 5.9 million, the population of Izmir will be 4.4 million, and the population of Bursa will be 3.1 million in 2023. The place of Adana, which is the fifth populous province in 2012, will be taken by the province of Antalya with a population of 2.6 million.
According to the 2012 based population projections of United Nations, world population is approximately 7 billion and 52 million. Turkey, which forms 1.1 percent of the world population in 2012 is the 18th of most populated country. In 2075, world population will increase to 9 billion and 905 million people. The rank of Turkey will change as 24.