Concatenate datasets efficiently

[Cruise]

Hi Folks:

I my data is stored by calendar years and I concatenated as shown in the code below. I'm curious if there was more efficient way to concatenate the datasets? I have more than 11 variables to read in actuality and I have to add variables onto all the lists every time I need I decide to add more variables into the analyses. 

data c.concatenated(COMPRESS=YES);
set c.data95(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
    c.data96(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data97(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data98(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data99(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data00(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data01(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data02(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data03(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data04(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data05(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data06(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data07(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data08(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data09(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data10(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data11(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data12(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
	c.data13(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11); 
run;  

[novinosrin]

HI @Cruise  Try this

UNTESTED

data c.concatenated(COMPRESS=YES);

set c.data95-c.data99(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11)
c.data00-c.data13(keep=var1 var2 var3 var4 var5 var6 var7 var8 var9 var10 var11); 
run;

[novinosrin · Accepted solution]

Or even

data c.concatenated(COMPRESS=YES);

set c.data95-c.data99(keep=var1-var11)
c.data00-c.data13(keep=var1 -var11); 
run;

[Cruise]

@novinosrin 

Worked like a magic. Thanks much. 

data c.concatenated(compress=yes); 
set c.data1995-c.data2013 (keep=gender ethnic race age lensty zip dob source1-source6 ....); 
run;