Suppose an investor opens an account by investing $1,000 at the beginning of 2012. He deposits an additional $1.000 at the end of 2013, and then he liquidates the account at the end of 2014. Suppose that the yearly returns for 2012, 2013 and 2014 in this account are: 4%, -5%, 10%. What was the investor's dollar-weighted average return for this three-year period? Enter your answer as a percentage rounded to two decimal places. For example, if your answer is 5.45%, enter 5.45