Rock bands have been around since 1952, which means (since it is 2011 as I type) that they have been around for 59 years so far. Bill Haley and his Comets is credited as being the first.
First of all, why did you write: ...Many years 'was' active. They are still active. They have been active from 1998 - 2010 (but are still going)
many bands have opened for shinedown such as Skillet, Puddle of Mudd, Chevelle, 10 years, Sevendust, and Like a Storm.
Many bands have Aerosmith as the hero. It still the only band after 40 years that has the original members of the band.
12.7% of Bands/Artists.
Although these two bands have been quite sucessful in album sales, there are many many many many artists/bands that have sold far more. Wikipedia has a list of the top selling albums/artists if you're interested in more info.
The battle with Grendel has been going on for 12 years.
The Commonwealth Games have been going on for 82 years.*As of 2012
4 years
For 70 years.
15 years
86 years.
Bharatanatyam has been around for 2,004 years.
54 years
Since 1893. 116 Years.
About 200 years (modern nation of Mexico, that is).
Rajon Rondo has been a pro for 5 years going on 6
Since 1930