Please answer a question about the following article about Namibia:

In 2013, global business and financial news provider, Bloomberg, named Namibia the top emerging market economy in Africa and the 13th best in the world. Only four African countries made the Top 20 Emerging Markets list in the March 2013 issue of Bloomberg Markets magazine, and Namibia was rated ahead of Morocco (19th), South Africa (15th) and Zambia (14th). Worldwide, Namibia also fared better than Hungary, Brazil and Mexico. Bloomberg Markets magazine ranked the top 20 based on more than a dozen criteria. The data came from Bloomberg's own financial-market statistics, IMF forecasts and the World Bank. The countries were also rated on areas of particular interest to foreign investors: the ease of doing business, the perceived level of corruption and economic freedom. In order to attract foreign investment, the government has made improvement in reducing red tape resulted from excessive government regulations making the country one of the least bureaucratic places to do business in the region. However, facilitation payments are occasionally demanded by customs due to cumbersome and costly customs procedures. Namibia is also classified as an Upper Middle Income country by the World Bank, and ranks 87th out of 185 economies in terms of ease of doing business.

What rank did Bloomberg name Namibia's economy?
13th best in the world