Complex sentence: As of 2009 French Polynesia produced 25 tons of vanilla annually, but a century ago production was much greater, with some 150 to 200 tons produced annually, and plantations employing a sizable percentage of the population.
Split into simpler sentences: As of 2009, French Polynesia produced 25 tons of vanilla annually. However, a century ago, production was much greater, with 150-200 ton produced annually, and plantations employing a sizable percentage of the population.