The automatic system has produced dramatic results. According to a study by Vanguard, 72% of employees under 25 save when they are in automatic plans. When companies don't offer automatic plans, only 18% of young employees elect to have money deducted from paychecks. To ensure that employees diversify their holdings, companies have introduced target-date funds. Holding diversified collections of stocks and bonds, the target funds are designed for savers who will retire around a certain year such as 2020 or 2040. The funds start with heavy stock allocations and gradually shift to bonds as the savers approach the retirement age. At many plans, the target funds are default options; if savers do nothing, their money goes into an appropriate target-date fund. With the increasing use of target funds, fewer young employees are putting all their assets in fixed income. Instead, new employees are investing heavily in stocks, an appropriate choice for savers who need to maximize growth over decades. According to Vanguard, savers in their early 20s had 41% of assets in stocks in 2003. By 2010, the stock allocation had climbed to 85% as the use of target funds spread.