San Francisco Fed President John Williams said on Thursday he expects above-trend economic growth in the United States for the rest of the year after a weak first quarter. Williams told reporters in Singapore that the weak economic growth in the first quarter was an “anomaly” affected by factors such as the weather. The U.S. economy should grow about 2 percent and unemployment should drift down below 5 percent this year, Williams said, but cautioned that more economic data needs to be collected before a decision on interest rates is made.