Proc Means

[Ksharp]

Use PROC SQL instead .

data have ;                                                         
  input n1 c1:$1. n2 c2:$2. n3 c3:$3. ;                             
  cards ;                                                           
0  .  00  AA  000  .                                                
.  B  11  .   111  BBB                                              
2  C  .   CC  .    CCC                                              
3  .  .   DD  333  DDD                                              
.  E  44  EE  444  .                                                
5  F  .   FF  555  FFF                                              
6  .  66  GG  666  GGG                                              
7  H  .   HH  .    HHH                                              
.  I  .   .   888  .                                                
9  .  99  JJ  999  .                                                
;                                                                   
run ; 

proc sql;
create table want as
select n(n1) as n_nomiss_n1,nmiss(n1) as n_miss_n1,
       n(c1) as n_nomiss_c1,nmiss(c1) as n_miss_c1
 from have;
quit;