Google:- According to the theory of biorhythms, a person's life is influenced by rhythmic biological cycles that affect his or her ability in various domains, such as mental, physical and emotional activity. ... The numbers from +100% (maximum) to -100% (minimum) indicate where on each cycle the rhythms are on a particular day.
Deja Vu - Be honest - Have u ever experienced a moment of repetition - Ever ?
My déjà vu's were always many years apart.