Plot stacked time series

Hello,

I have a time series of a variable X with weekly values between Jan and Dec from 1986 to 1995 (10 years). My date (YYYYMMDD) has a datetime format.

How could I plot a stacked figure, i.e. the same X axis, Jan to Dec, wich would display each year on the same figure and not in a continuous mode (years after years)

Cheers