Seasonal Adjustment ( computed seasonal coef) - calcul des coefficients saisonniers

[MedSAS]

Hello,

I want to calculate a seasonnal coefficients of the attached series.

Thank you very much for your help !  

This is my PGM ( i don't understand of these procedures) : 

Data WORK.Donnees ;
%Let _EFIERR_ = 0;
Infile "C:\Users\Desktop\test2.csv" Delimiter = ';' MISSOVER Lrecl=32767 Firstobs=2 ;
Informat annee best32. ;
Informat trimestre best32. ;
Informat Date yyQ7. ;
Informat Var numx5.1 ;
Format Date yyQ7. ;
Input Annee Trimestre Date VAR;
If _ERROR_ then call symputx('_EFIERR_',1);
Run;

Proc means data = donnees;
Class annee;
Var Var;
Run;

Proc means data = donnees;
Class trimestre;
Var Var;
Run;

Proc x12 data=donnees date=date;
var Var;
x11;
ods select d1 d10d d11 d12 d13;;
Run;

Proc timeseries data=donnees plot=series;
id date interval=quarter;
var Var;
Run;

Proc timeseries data=donnees outseason=season
plots=(series TC SC IC SA);
id date interval=quarter;
var Var;
decomp ORIG TC SC IC SA/mode=MULTORADD;
Run;

title1 "Seasonal Statistics";
Proc sgplot data=season;
series x=_season_ y=max / lineattrs=(pattern=solid);
series x=_season_ y=mean / lineattrs=(pattern=solid);
series x=_season_ y=min / lineattrs=(pattern=solid);
yaxis display=(nolabel);
xaxis values=(1 to 4 by 1);
Run;