Simplify the following text for a Grade 13 native English-speaking person.
Original: Sverigetopplistan , earlier known as Topplistan and Hitlistan and other names , is since October 2007 the Swedish national record chart , based on sales data from Swedish Recording Industry Association ( in Swedish GrammofonleverantÃ rernas fÃ rening ) .
Simplified: Sverigetopplistan , also known as Topplistan and Hitlistan , is since October 2007 the Swedish national record chart , based on sales data from Swedish Recording Industry Association .