After independence in 1960, the pace of growth increased further. The city's population reached 1.4 million by the end of the 20th century; in 2013, it was estimated at nearly 2.1 million. Uncontrolled urban sprawl has challenged the city's infrastructure, producing shortages of clean water and electricity, sanitation and public health problems, and heavy traffic congestion. There are more than 5,000 church buildings in the city and its suburbs, including an Anglican and a Roman Catholic cathedral. Antananarivo is the see city of Madagascar's Roman Catholic Archdiocese. The city has repeatedly been the site of large demonstrations and violent political clashes, including the 1972 "rotaka" that brought down President Philibert Tsiranana and the 2009 Malagasy political crisis, which resulted in Andry Rajoelina replacing Marc Ravalomanana as head of state.