More Americans are quitting their jobs than at any other time in at least two decades, adding to the struggle many companies face trying to keep up with the economic recovery. The wave of resignations marks a sharp turn from the darkest days of the pandemic, when many workers craved job security while weathering a national health and economic crisis. In April, the share of U.S. workers leaving jobs was 2.7%, according to the Labor Department, a jump from 1.6% a year earlier to the highest level since at least 2000. The shift by Americans into new jobs and careers is prompting employers to raise wages and offer promotions to keep hold of talent. The appetite for change by employees indicates many professionals are feeling confident about jumping ship for better prospects, despite elevated unemployment rates.