Austria population. The total fertility rate (TFR) in 2013 was estimated at 1.42 children born per woman, which is lower than the replacement rate of 2.1. In 2015, 42.1% of births were to unmarried women. The life expectancy in 2016 was estimated at 81.5 years (78.9 years male, 84.3 years female). Standard Austrian German is Austria's official language, though used primarily just in education, publications, announcements and websites. It is mostly identical to the Standard German of Germany but with some vocabulary differences. The German language is standardised between countries of German mother tongue, i.e., Germany, Austria, Switzerland and Liechtenstein, as
Official language to the government in their native languages. In countries that do not formally designate an official language, a "de facto" national language usually evolves. English is the most common official language, with recognized status in 51 countries. Arabic, French, and Spanish are also widely recognized. An official language that is also an indigenous language is called "endoglossic", one that is not indigenous is "exoglossic". An instance is Nigeria which has three endoglossic official languages. By this the country aims to protect the indigenous languages although at the same time recognising the English language as its lingua franca. Around 500 BC,