How old was Sleeping Beauty when she fell into the deep sleep in the Disney movie "Sleeping Beauty"?

Princess Aurora was born from King Stefan and his wife, Queen Leah. At her christening, she was given gifts by two of the three fairies that showed up. Following this, the bad fairy named Maleficent showed up, angry at not being invited, and put a curse on Aurora stating that at the age of sixteen, she would prick her finger on the spindle from the spinning wheel and die. Luckily the third good fairy, named Merryweather, had not presented a gift yet and is able to change the curse to sleep instead of death.