Mr. Perot added a number of anecdotes from his own considerable experience in dealing with this issue for over twenty years.

CENTERFORSECURITYPOLICY: Center For Security Policy

Striving to navigate everyday challenges in an unfamiliar culture and language, immigrant families often work grueling hours for over twenty years to purchase a home.

WHITEHOUSE: Champions of Change Blog

My sister has been practicing general medicine for over twenty years.

FORBES: The News From AOL Isn't Surprising. But The Reaction Is Disgusting.

He was a friend of mine for over twenty years.

BBC: Richard Holbrooke

For over twenty years, the Inspector General has recommended that Congress close the loop-hole in the federal law applicable to pensions, ERISA, that allows this state of affairs to persist.

FORBES: Pension Red Alert: 70% Of Pensions Are Never Audited

One of them, Danny Saunders, who's been travelling on the train for over twenty years thought it was the most exciting thing that's happened since he first started travelling on the line.

BBC: Valley Lines poets make tracks

Four schools in Newton, MA will get solar panels, paying Ameresco only for the electricity generated over the next twenty years.

FORBES: Ameresco Revenues Fall Off Fiscal Cliff

The Kings Fund has commissioned Sir Derek Wanless to carry out a review of social care needs for the elderly to evaluate the likely costs over the next twenty years.

BBC: NEWS | Health | Elderly care 'failings' attacked

Meeting in Jomtien, just over twenty years after the 1990 World Conference on Education for All, has been a symbolic act renewing the initial spirit and commitment of the global community towards education.

UNESCO: World Water Assessment Programme (WWAP)