The Moscow-based independent military think-tank Centre for Analysis of Strategies and Technologies has analysed the identified exports of Russian weapons in the year 2009. The share of different weapon types was the following: 61% Aerospace, 21% Ground, 9% Naval, 8% Air Defense and 1% other. In 2010–11,Algeria was the top customer (with an export share of 29%), followed by India (25%) (once India was the largest importer in terms of quantity, and it is still the largest importer in terms of value/money paid) and China (10%). Vietnam became Russia's largest weapons customer in terms of new contracts signed in 2009, especially due to a large order for six Project 636M Kilo-class submarines. Vietnam is expected to considerably increase its share of Russian arms exports in the future. Russia's military exports between 2008 and 2011 amounted to $29.8 billion. The top three customers were India ($8.2 billion), Algeria ($4.7 billion) and China ($3.5 billion). These importers accounted for 55.47 percent of its total exports during that period.