(ANSA) - Rome, December 17 - More than half a million Italians aged 50-69 said they have yet to pay into a pension plan, national statistics agency Istat reported Tuesday. These 541,000 people ''are at risk of being unable to support themselves in their old age'', Istat said in its report based on 2012 data. The highest percentages of those without a pension in their future are women and southerners, the report showed.