BERLIN  Germany has sparred with its European partners over how to respond to the financial crisis, argued with the United States over the benefits of stimulus versus austerity, and defiantly pursued its own vision of how to keep its economy strong.

Statistics released Friday buttress Germany’s view that it had the formula right all along. The government on Friday announced quarter-on-quarter economic growth of 2.2 percent, Germany’s best performance since reunification 20 years ago  and equivalent to a nearly 9 percent annual rate if growth were that robust all year.

The strong growth figures will also bolster the conviction here that German workers and companies in recent years made the short-term sacrifices necessary for long-term success that Germany’s European partners did not. And it will reinforce the widespread conviction among policy makers that they handled the financial crisis and the painful recession that followed it far better than the United States, which, they never hesitate to remind, brought the world into this crisis.

A vast expansion of a program paying to keep workers employed, rather than dealing with them once they lost their jobs, was the most direct step taken in the heat of the crisis. But the roots of Germany’s export-driven success reach back to the painful restructuring under the previous government of Chancellor Gerhard Schröder.