According to the U.N. 2015 Revision of World Population Prospects, Bosnia and Herzegovina, Bulgaria, Croatia, Hungary, Japan, Latvia, Lithuania, Moldova, Romania, Serbia, and Ukraine are at risk of experiencing population decline. The U.N. report states that Croatia's population in 2015 was 4.24 million and that nearly 2.2 million are women. it is estimated that Croatia's population could go down to 3.97 million by 2030, to 3.55 million by 2050 and to only 2.61 million by 2100.
This means that by 2050 Croatia's population could shrink by 686,000 people or 16.2 per cent.
The projections for Bulgaria are the worst -- its population is expected to decline by 27.9 per cent. Bulgaria is followed by Romania and Ukraine expected to lose one fifth of their populations while Bosnia's population is expected to decline by 19.5 per cent and Serbia's by 17.2 per cent
Croatia is also expected to experience the aging of its population -- by 2050, 46.9 per cent of Croatia's population will be over 60, while today people over 60 make up 30.7 per cent of the overall population. The median age in Croatia in 2015 is 42.8 years, and it is expected to reach 49.6 years in 2050.
Life expectancy in Croatia is 77 years and it is projected to rise to 83 years by 2050.
According to the results of the 2015 Revision, the world population reached 7.3 billion as of mid-2015, implying that the world has added approximately one billion people in the span of the last twelve years. Sixty per cent of the global population lives in Asia (4.4 billion), 16 per cent in Africa (1.2 billion), 10 per cent in Europe (738 million), 9 per cent in Latin America and the Caribbean (634 million), and the remaining 5 per cent in Northern America (358 million) and Oceania (39 million). China (1.4 billion) and India (1.3 billion) remain the two largest countries of the world, both with more than 1 billion people, representing 19 and 18 per cent of the world’s population, respectively.
In 2015, 50.4 per cent of the world’s population is male and 49.6 per cent is female. The median age of the global population, that is, the age at which half the population is older and half is younger, is 29.6 years. About one-quarter (26 per cent) of the world’s people are under 15 years of age, 62 per cent are aged 15-59 years, and 12 per cent are 60 or over.
In 2016, it is projected that 83 million people will be added to the world’s population. Even assuming that fertility levels will continue to decline, the global population is still expected to reach 8.5 billion in 2030, 9.7 billion in 2050 and 11.2 billion in 2100, according to the medium projection variant.