What % of your opens happen in the first hour?

Hey Guys,

I'm sending out a daily newsletter. I have about 20-25% of my email list opening my email in the first hour, but after the first hour I get very few opens.

80-90% of my opens happen within the first hour after I send my email.

Does this mean my email is getting buried in people's inboxes?

What would you guys recommend to fix this?

Thanks!