Before 1989, Romania was among the top ten arms exporters in the world, however its arms industry declined considerably during the 1990s. Exports fell from roughly $1 billion before 1989 to about $43 million in 2006, and the number of employees also fell from 220,000 in 1990 to 20,000 in 2009. Sales to the Romanian Armed Forces have plunged after Romania's accession to NATO in 2004, as factories continue to produce Warsaw Pact-caliber weapons and ammunition, which are incompatible with their Western counterparts.