Oh poor, poor Sony/BMG/EMI CEOs who absolutely couldn't buy another yacht while lowering their expenses by literally making money out of thin air by literally copying digital music. /me wets a handkerchief with the tears of compassion.
You are spamming that graph, but only because you think it supports your opinion.
Except it does not. Go to RIAA, select Adjusted for inflation and select all years.
You would see what by 2017 the revenue is on par with 1981.
What happened in 1990-1998 what skyrocketed the revenue levels to be twice of that period?
The compact discs.
What happened in 2001-2008 what returned the revenue to almost 1981 levels?
Nobody wanted the fucking compact discs anymore.
They are bulky, you need a good player with at least 40sec anti-shock, you can't run with it, you need a fanny pack or something to even have it with you if you don't want to clip it on your jeans belt (if you don't even have a belt, eg track suit or skirt/dress) and god forbid you wanted more then one album (ie CD) with you, now you need to bring the CD bag with you.
And why people didn't want CDs no more?
Flash and for some time - 1"/1.8" HDD players.
People tasted how it can be to have multiple albums (and with HDD players - your whole library) on a small, compact device which is immune or way more resistant to the shock, doesn't chew the batteries and hey! shows the artist and song title!
'Piracy killed music industry [revenue]' is the bullshit, it's just what by 2008 you could no longer sell a $0.10 piece of polycarbonate for $19.99, people didn't wanted them anymore. Of course your 200% profit margin doesn't exists anymore and it shouldn't had existed in the first place.