Rainbow Lorikeet..egg layer

I have a female Rainbow Lorikeet that is 12 years old. She has never been with a male. She started laying eggs when she was 1 or 2, don't really remember.
Every 3-4 months she layed 2 eggs. The last time was in February 2012, 6 months ago.

My question is: Will she not lay anymore? Is she past the age, or should I worry?