The 1993 Elvis Presley postage stamp remains the U.S. Postal Service's most-collected stamp, although the Wonders of America series has climbed into second place among collectors. Americans saved 124.1 million stamps featuring Presley and 87.5 million stamps from the Wonders of America series, according to the Postal Service. The 1992 series of wildflowers was saved by 76.1 million people. The Rock & Roll/Rhythm & Blues series, also released in 1993, was saved by 75.9 million people and featured Presley, Bill Haley, Clyde McPhatter, Richie Valens, Otis Redding, Buddy Holly and Dinah Washington.