Latvia parts of the Russian Empire, which may have been influenced by the Protestant religion of the inhabitants. World War I devastated the territory of what became the state of Latvia, and other western parts of the Russian Empire. Demands for self-determination were initially confined to autonomy, until a power vacuum was created by the Russian Revolution in 1917, followed by the Treaty of Brest-Litovsk between Russia and Germany in March 1918, then the Allied armistice with Germany on 11 November 1918. On 18 November 1918, in Riga, the People's Council of Latvia proclaimed the independence of the new country, with
Health in Latvia human capital with 23 health, education, and learning-adjusted expected years lived between age 20 and 64 years. As of 2009, there were approximately 8,600 inhabitants of Latvia living with HIV/AIDS, accounting for a 0.7% adult HIV prevalence rate. There were 32,376 (1.44%) individual instances of clinically reported alcoholism in Latvia in 2008, as well as cases of addictions to other substances. The annual number of births per 1,000 adolescent women aged 15 to 19 has declined from 49.9 in 1990 to 17.9 in 2007. In 2005, Latvia had a suicide rate of 24.5 per 100,000 inhabitants (down from 40.7 in