Bed ramp for 100 lb dog?

My big girl is 10 and she loves to lay on the bed. My bed is pretty high. She still does okay jumping on the bed even though she's big – but I notice the jumps are getting lower. She's needed some help the past week. What can I get her to more easily get on the bed? I'm not sure she would climb a ramp. She definitely has gravity insecurity – but I'm willing to try if that's the only reasonable option.