Shell Programming and Scripting

Hello,
I have massive number of big files that needed to be counted for the total number of lines (> 100x millions) each. I want the file name attached to the count results so that they are aligned nicely matching name and counts.
I could do each file at a time, which will take hours to finish, so that the jobs were sent to background as I have multiple cores available to get the job done quickly. The problem with my script is the "echo -n $f" "; always accomplishes first, and the ${f}_R1.fq.gz | wc -l part is behind too much and the result was not aligned as expected.

Here is my code:

Code:

for f in $(cat ${LIST1}); do 
echo -n $f" "  >> raw_reads_count.table1; 
zcat ${f}_R1.fq.gz | wc -l >> raw_reads_count.table1 &      #This is the part
 done
------------------------------------------------------------------------------------------------------
messed-up output:
a      
bb    
ccc   
xyz 
267234214
777234211
937214233
1027254258
------------------------------------------------------------------------------------------------------
 Expected output:
a    267234214
bb   937214233
ccc  777234211
xyz 1027254258

How should I improve my script to get what is expected? Thanks a lot!