Younger generations are saving more for retirement than their parents and grandparents, according to a new survey by TD Ameritrade Holding Corp.

Investors as a whole are making steady progress toward their long-term financial goals, despite a turbulent stock market and economy, but many older Americans are missing out on opportunities to position themselves for further success, the report found.

According to the survey, 85 percent of working Americans have an Individual Retirement Account or a 401(k)/403(b) plan. More than a third have both. But it's the younger generation of workers who are more diligently saving: 25 percent of Gen Y and 23 percent of Gen X are funding both their 401(k)/403(b) plans and their IRAs, compared to 16 percent of Boomers and 9 percent of Matures. The survey also found that 74 percent of Boomers are not completely confident that they will reach their savings goal by the time they retire.