麻烦各位朋友看一下这程序有何问题

南山忆

assume cs:code,ds:data,es:table
  data segment
  db'1975','1976','1977','1978','1979','1980','1981','1982','1983'
  db'1984','1985','1986','1987','1988','1989','1990','1991','1992','1993'
  db'1994','1995'
  
  dd 16,22,382,1356,2390,8000,16000,24486,50065,97479,140417,197514
  dd 345980,590827,803530,1183000,1843000,2759000,3753000,4649000,5937000
  
  dw 3,7,9,13,28,38,130,220,476,778,1001,1442,2258,2793,4037,5635,8226
  dw 11542,14430,15257,17800
  data ends
table segment
   db 21 dup ('year summ ne ?? ')
table ends
code segment
start:mov ax,data
mov ds,ax
mov ax,table
mov es,ax

mov bx,0
mov di,0
mov cx,21

s:mov al,[bx]
mov es:[di],al
mov al,[bx+1]
mov es:[di+1],al
mov al,[bx+2]
mov es:[di+2],al
mov al,[bx+3]
mov es:[di+3],al

mov ax,[bx+54]
mov dx,[bx+56]
mov es:[di+5],ax
mov es:[di+7],dx
add bx,4
add di,10h
loop s

mov bx,0
mov di,0
mov cx,21
s1:mov ax,[bx+0a7]
mov es:[di+0ah],ax
add bx,2
add di,10h
loop s1
mov di,0
mov cx,21
s2:mov ax,es:[di+5]
mov dx,es:[di+7]
div word ptr es:[di+0ah]
mov es:[di+13],ax
add di,10h
loop s2
mov ax,4c00h
int 21h
code ends
end start
编译的时候说s1未定义？？？？？？