data text1;
input ID year Money ;
cards;
1 2010 200
1 2011 550
1 2012 350
2 2010 200
2 2011 430
2 2012 570
2 2013 550
3 2010 450
3 2013 235
4 2012 550
5 2010 570
5 2011 350
5 2012 220
5 2013 750
6 2010 150
6 2012 350
6 2013 540
7 2010 355
7 2011 465
7 2012 460
8 2013 500
;
run;

proc sort data = text1;
by id year;
run;

data want(keep=id);
        set text1;
        by id;
        retain lyear;
        if first.id then do;
                lyear = year;count = 1;end;
                else do;
                        if year = lyear + 1 then do; lyear = year;count+1;end;
        end ;
        if last.id and count>=3 then output;
run;

如果没有2011或2012 年那就绝对不是了