The Nauruan language is the official language of Nauru, but English is often used in the country. Nauruan is declared as the primary language of 95.3% of the population. The 2011 census revealed that 66.0% of the population spoke English and 11.9% another language. The main religions of Nauru are Nauru Congregational Church (35.71%) and Roman Catholic (32.96%). The literacy rate in Nauru is 96.5%. The proportion of the countrys population aged 15 and over attaining academic degrees is one of the lowest in the world, reaching 7.9% in 2011. An estimated 10.7% of the gross domestic product (GDP) is spent on education. Nauru has a universal health care system, and in 2012, an estimated 7.5% of its GDP was spent on healthcare. Nauru has the highest obesity ranking in the world; 97 per cent of men and 93 per cent of women are obese. In 2006, the average net monthly income was Australian dollar2,597 (A$ in 2014). The most significant sources of employment are Phosphate mining in Nauru, banking industries, and various coconut products. In 2011, the unemployment rate was 23%. The 2011 census enumerated 1,647 total households, averaging 6.0 persons per house. Average Urbanization in Nauru is 100%.. For how many percent of people is Nauruan not the primary language?