Anna is an active investor and invests in a portfolio consisting of stocks, fixed income products and mutual funds. Over the years, her investments have been doing well and yielding a good amount of interest, dividends and capital gains. This year was an exception, and her portfolio registered a capital loss of $5,000. Since she has paid tax on her capital gains so far in previous years, for how many years can Claudia carry back her net capital loss to reduce previous taxable capital gains?