AP Business Writer

FRANKFURT, Germany (AP) _ A closely-watched survey has found business activity across the 18-country eurozone running at a three-year high, in perhaps the clearest sign yet that the economic recovery is gaining momentum.

Analysts say Wednesday’s positive data could take some of the pressure off the European Central Bank to take further steps to stimulate the economy at its next monthly policy meeting on May 8 despite stubbornly low inflation across the 18-country single currency zone.

The Markit survey of purchasing managers _ a closely watched gauge of business activity _ climbed to 54.0 in April from 53.1 in March. That’s the highest reading since May, 2011. Anything over 50 indicates expansion.

Analysts said Wednesday’s figures, which cover both services and manufacturing companies, showed that the modest recovery in the eurozone was exhibiting increasing strength.

“Growth is increasingly reaching proper recovery speed, thanks largely to rebounding domestic demand,” economist Christian Schulz at Berenberg Bank said.

Schulz said the strong rise for the services part of the survey, to 53.1 from 52.2 in March, gave a better reading for demand from businesses and consumers at home. That’s as opposed to exporters whose business depends more on the global economy.

Alarmingly low inflation of only 0.5 percent and high unemployment have raised fears the rebound was too weak to sustain itself and would require more stimulus from the European Central Bank. The eurozone grew by a quarterly rate of 0.2 percent in the fourth quarter of last year. The ECB expects the economy will grow by only 1.0 percent this year.

Still, unemployment remains painfully high at 11.9 for the eurozone as a whole.

The ECB, in charge of monetary policy for the euro member countries, faces pressure to cut interest rates or take other measures to increase inflation toward its goal of just under 2 percent.

Low inflation is a sign of continuing weak demand, and can make it harder for indebted countries, companies and consumers to pay down debt. Some economists fear that if further measures are not taken, the eurozone could slip into outright deflation, a crippling downward price spiral that kills off growth and jobs. Despite the recent falls in inflation, the ECB says deflation is unlikely.

Wednesday’s figures suggest inflation will gradually rise, Schulz said, but some analysts still say the ECB may yet cut its benchmark interest rate or take other action in the coming months.