Union versus private Rn payscales?

[apexsw20trd]

so i was wondering how this pay scale works in your area. i know that union hospitals have a barganing agreement where the specific RN recieves a step in wage increases after so mnay hours of work is performed. but how is it in private non-union hospitals? do the private hospitals evaluate you every year and give you a raise in your overall performance or do they just pay you the same rate for 5 years and forget about you until you ask for a raise?

and also how much are the increases from union to non-union positions?$1.00, $2.00 ????

thank you for your input.:)