located in the eastern part of the country and the Portorož Airport in the western part. The state-owned Adria Airways is the largest Slovenian airline; however in 2019 it declared bankruptcy and ceased operations. Since 2003, several new carriers have entered the market, mainly low-cost airlines. The only Slovenian military airport is the Cerklje ob Krki Air Base in the southwestern part of the country. There are also 12 public airports in Slovenia. Demographics With 101 inhabitants per square kilometer (262/sq mi), Slovenia ranks low among the European countries in population density (compared to 402/km2 (1042/sq mi) for the Netherlands or 195/km2 (505/sq mi) for Italy). The Inner Carniola–Karst Statistical Region has the lowest population density while the Central Slovenia Statistical Region has the highest. Slovenia is among the European countries with the most pronounced ageing of its population, ascribable to a low birth rate and increasing life expectancy. Almost all Slovenian inhabitants older than 64 are retired, with no significant difference between the genders. The working-age group is diminishing in spite of immigration. The proposal to raise the retirement age from the current 57 for women and 58 for men was rejected in a referendum in 2011. In addition, the difference among the genders regarding life expectancy is still significant. The total fertility rate (TFR) in 2014 was estimated at 1.33 children born/woman, which is lower than the replacement rate of 2.1. The majority of children are born to unmarried women (in 2016, 58.6% of all births were outside of marriage). In 2018, life expectancy at birth was 81.1 years (78.2 years male, and 84 years female). In 2009, the suicide rate in Slovenia was 22 per 100,000 persons per year, which places Slovenia among the highest ranked European countries in this regard. Nonetheless, from 2000 until 2010, the rate has decreased by about 30%. The differences between regions and the genders are pronounced. Urbanisation Depending on definition, between 65% and 79% of people live in wider urban areas. According to OECD definition of rural areas none of the Slovene statistical regions is mostly urbanised, meaning that 15% or less of the population lives in rural communities. According to this definition statistical regions are classified: mostly rural regions: Mura, Drava, Carinthia, Savinja, Lower Sava, Littoral–Inner Carniola, Gorizia, Southeast Slovenia moderately rural regions: Central Sava, Upper Carniola, Coastal–Karst, Central Slovenia. The only large town is the capital, Ljubljana. Other (medium-sized)