Aloha !

Your findings are skewed, and I'll get a bit technical with my explanation.

This is most likely your source: https://hitparade.ch/song/Bon-Jovi/L...-A-Prayer-1551

According to your source, Livin' On A Prayer only charted for 12 weeks and yet It's My Life charted 33 weeks. Sure, It's My Life was massive, but there's another reason for this. Over time, charts change. When Livin' On A Prayer charted, the chart consisted of 30 spots. When Dry County charted this was turned to 50 spots. By the time It's My Life charted this was turned to 100.

Now let's say Livin' On A Prayer gets to spot number 27 by it's 12th week on the chart. This means it most likely leaves the charts in week 13. Now the same happens to It's My Life. However, in week 13 it gets another week on the chart as there's more positions to fill.

Further on, where are You Give Love A Bad Name & Wanted Dead Or Alive? The songs did chart, but for whatever reason aren't part of the database.

To get an accurate look you'd have to make a list of all songs and cap their chart life whenever it leaves the top 30 as it's the only data available for all songs. It's My Life now spends 20 weeks on the chart instead of 33. A song like Dry County now suddenly has 7 weeks on the chart as opposed to its original 10. We Weren't Born To Follow gets 6 instead of 12. This gives a lot of songs fewer points and would make for a very different list.

That said though, a song like Who Says You Can't Go Home would still end up very low on the list as it never cracked the top 30, which really showcases how out of place the song is in European setlists. It's like playing Because We Can in the U.S.A. The song never charted, surely they wouldn't try to shove that one in people's throat either? Oh wait...

Have fun.

Salaam Aleikum,
Sebastiaan