Production change in 2005 = $$\frac{50-30}{30}\times\ 100\ =\ 66.67\%$$, in 2006 = $$\frac{15}{50}\times\ 100\ =\ 30\%$$, in 2007 = $$\frac{20}{35}\times\ 100\ =\ 57.14\%$$, in 2008 = $$\frac{5}{55}\times\ 100\ =\ 9.09\%$$, in 2009 = $$\frac{10}{50}\times\ 100\ =\ 20\%$$ and, in 2010 = $$\frac{5}{60}\times\ 100\ =\ 8.33\%$$. So, the highest change is in 2005.
