 The British Geological Survey reports that in 2001 , China was the top producer of cadmium with almost one @-@ sixth of the world 's production , closely followed by South Korea and Japan . 
 The British Geological Survey <a href='uninflect' title='1'><mark>reports</mark></a> that in 2001 , China was the top producer of cadmium with almost one @-@ sixth of the world <a href='null_genetive' title='2'><mark>'s</mark></a>production , closely followed by South Korea and Japan . 
Da British Geological Survey report dat in 2001 , China was tdatop producer of cadmium with almost one @-@ sixth of the world  production , closely followed by South Korea and Japan .