在学习sas里怎么做arima，弄了半天，还是云里雾里
比如下面有这样一个序列，后面应该怎么写呢

data seriey6;
infile 'D:\m1 ief\series temporelles\rapport\y6.txt';
input x;
date = intnx('month', '31dec2012'd, _n_ );
format date monyy.;
run;
proc print data = seriey6;
run;

proc gplot;
plot x*date;
symbol i=spline;
run;

proc arima data=seriey6;
  identify var=x nlag=12;
  run;

identify var=x(1) nlag=12;
run;

序列
1.317686118635670
0.484368991707138
-0.247359049350209
2.559313323826210
5.416323882641140
3.390281391945540
-0.131705991555303
0.786257398193770
4.953138974982430
3.645088231591140
0.558523973118096
0.923261272959544
2.265758051411490
0.053043961527473
-1.473758517040050
-1.057269874828650
-0.221835531897197
-2.288367798329980
-2.560343600814150
-0.637677697795701
-1.145829884752150
-2.873690293837550
-4.637620342089540
-4.979172091190360
-6.278254146857120
-7.279426966518640
-9.125066824012270
-9.878534247149560
-10.216988532136600
-11.368287465851400
-12.311578519265400
-11.010483822421100
-9.331157163482440
-9.489271141191790
-10.860153332145600
-11.617920755068500
-11.798077898796200
-11.337549436746300
-11.915237360659500
-10.526695197825500
-9.104135697881720
-7.496736631968090
-6.322194856346660
-5.640790648505440
-4.964578399811310
-2.997901249453290
-2.671625127680510
-3.243385960854730
-2.886059067180650
0.143424593113909
0.569020227067109
0.797774936223080
1.378028686858470
4.559941636337660
6.719295927198100
6.246970937082220
5.087760709503610
8.517782261549370
9.393022806861980
7.971262990911620
7.715061774971170
11.854856120952700
12.921679117368700
11.085177808218400
10.494906004104000
15.690943807826400
16.423534635720100
11.057176905874100
8.944160648089460
13.751420359256500
14.798318314956500
11.627937292919800
10.336964103701700
15.808507858900200
19.046205414706800
18.550439208700500
18.343574223358200
22.824161023869900
24.523482272903800
23.827099894239900
23.106239160571000
25.909961330941800
25.650268901462500
26.923156962091000
26.714945765081200
28.294372586787200
26.436597503497400
25.828693139709600
23.836010342442600
23.015423746720000
19.036196936017700
17.835280570843400
14.564278053566700
13.651641259449200
12.309051775548500
11.002455288103800
11.075395583070200
13.413737111697200
11.772231104742200
11.240845236235800
10.470291581689900
8.777049196353830
5.802618830624420
5.162970998394000
4.744857554378060
2.502072859583170
1.225022969340440
0.411529353901386
-1.863860737258460
-7.315680311632940
-9.589000165078730
-11.411505936544100
-13.527203400191300
-19.831837578569600
-24.777972846741300
-28.031687524031900
-29.539014148611100
-34.498065933196600
-34.674468739072000
-35.334623426428100
-36.262979391227800
-38.378515432014800
-37.176726428813800
-38.449333019513600
-41.860580429738000
-45.904570348516000
-45.189104132926300
-45.832041332059600
-45.882071852373500
-47.130583362116900
-45.945184103574100
-45.281617963115500
-44.597250895597800
-45.693260111679600
-46.643488013715800
-44.326052441130200
-44.286924267088500
-45.195367138968600
-47.746879552694300
-45.709709169679200
-45.870384655213100
-45.364041678423800
-45.236372370075400
-45.837215567866100
-48.046038601553700
-48.254198886455800
-50.145882255591800
-49.647417091284500
-50.061173758004100
-49.906196039859900
-50.874203068907900
-50.206264812281900
-51.049645332003000
-50.530275777132700
-50.907479825767900
-50.314066743316600
-48.428228697780200
-46.357862181308100
-48.245437644574800
-48.727067257288800
-48.138531890294900
-44.936155686511900
-44.402012095651500
-42.480673719494700
-40.834187247650700
-36.703304299416400
-35.904620389657200
-33.407722827943900
-30.857775489510700
-28.328657544768000
-29.037015114871800
-28.387805302666000
-28.875287038553300
-29.107073156971300
-28.769366921654500
-24.320310514796400
-23.097645211997900
-22.576025735364200
-19.714614621784100
-15.760680899995800
-14.671899929264200
-12.717966754022900
-8.374015443599440
-3.669961143440670
-2.435477882786290
-2.831953120987100
0.242157505944892
3.184083936861200
5.784237665597820
10.302383210691000
15.179329714502900
18.048123688944200
20.655964312169500
25.185379234935800
29.680091652843600
33.369720056882600
36.014721852063600
40.038555420417000
42.492381530253100
46.159889599411500