Spain’s economy showed fresh strain as retail sales fell at a record pace in April, showing the government’s austerity program is strangling consumption and suggesting deepening recession. Data Tuesday from the National Statistics Institute, or INE, showed seasonally adjusted retail sales fell 9.8% on the year in April, compared with a 3.8% drop in March. The decline was the sharpest since INE started collecting the data in January 2004. Household spending is dropping as unemployment approaches 25% of the work force.