Original sentence: His concert performances were staggering in quantity, numbering 1,145 in  the eight years from 1969 to 1977.His shows in Vegas were known for highly energetic performances—both vocally and physically—and his sartorial jump-suits and capes, which added to the drama.His voice, which developed into many voices as his career progressed, had a unique tonality and  an extraordinarily unusual center of gravity, leading to his ability to tackle a range of songs and melodies which would be nearly impossible for most other popular singers to achieve.In the late 1960s, Presley re-emerged as a live performer of old and new hit songs, both on tour and in Las Vegas, Nevada
Edited sentence: His concert performances were staggering in quantity, considering they numbered 1,145 in 8 years, 1969-1977.His voice, which developed into many voices as his career progressed,   had always a unique  tonality and  an extraordinarily unusual center of gravity, leading to his ability to tackle a range of songs and melodies which would be nearly impossible for most other popular singers to achieve.In the late 1960s, Presley re-emerged as a live performer of old and new hit songs, both on tour and in Las Vegas, Nevada, where he was known for his on-stage highly energetic performances both vocally and physically, his sartorial jump-suits and capes adding to the drama