The review and update of the market figures was prompted by Zuken when incorrect numbers from Gary Smith EDA were published and widely distributed by other EDA vendors. The previous numbers had not been provided or verified by Zuken.
Read the post from Gerhard Lipski, the western representative of the Zuken global board of directors, on the Zuken blog for more information: http://blog.zuken.com/index.php/2011/02/zuken-world-2-in-pcb-design-market-share-according-to-updated-figures-from-gary-smith-eda/