Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.093358 -0.013746 -0.012753  0.002888  0.184059 

Coefficients:
            Estimate Std. Error t value Pr(>|t|)    
(Intercept)  0.10984    0.03209   3.423 0.000658 ***
xca         -0.03261    0.03706  -0.880 0.379171    
xcs         -0.08659    0.03516  -2.463 0.014030 *  
xda         -0.10982    0.03706  -2.963 0.003150 ** 
xde         -0.07060    0.03255  -2.169 0.030422 *  
xel         -0.04185    0.03404  -1.229 0.219331    
xen         -0.09610    0.03214  -2.990 0.002888 ** 
xes         -0.09500    0.03227  -2.944 0.003355 ** 
xet         -0.08930    0.03706  -2.410 0.016229 *  
xfa         -0.09606    0.03931  -2.444 0.014788 *  
xfi         -0.08645    0.03931  -2.200 0.028181 *  
xfr         -0.08462    0.03235  -2.616 0.009092 ** 
xhr         -0.09922    0.03706  -2.677 0.007602 ** 
xhu         -0.09372    0.03588  -2.612 0.009203 ** 
xis         -0.10977    0.03588  -3.059 0.002306 ** 
xit         -0.10657    0.03706  -2.876 0.004159 ** 
xiw          0.01449    0.03931   0.369 0.712555    
xja         -0.10982    0.03931  -2.794 0.005354 ** 
xka         -0.08489    0.03516  -2.415 0.016022 *  
xko         -0.08180    0.03383  -2.418 0.015874 *  
xky         -0.10982    0.04539  -2.420 0.015795 *  
xlt         -0.09594    0.03588  -2.674 0.007684 ** 
xlv         -0.07643    0.03588  -2.130 0.033523 *  
xmng        -0.05755    0.04539  -1.268 0.205257    
xnl         -0.06717    0.03516  -1.911 0.056487 .  
xno         -0.09835    0.03431  -2.867 0.004279 ** 
xpl         -0.10618    0.03931  -2.701 0.007078 ** 
xpt         -0.10441    0.03285  -3.178 0.001548 ** 
xro         -0.08652    0.03588  -2.411 0.016161 *  
xru         -0.08202    0.03383  -2.424 0.015592 *  
xsk         -0.09931    0.03706  -2.680 0.007545 ** 
xsl         -0.03101    0.03588  -0.864 0.387818    
xsq         -0.10983    0.04539  -2.420 0.015787 *  
xsr         -0.08337    0.03931  -2.121 0.034292 *  
xsv         -0.10213    0.03466  -2.946 0.003329 ** 
xth         -0.09197    0.03706  -2.482 0.013316 *  
xvi         -0.10886    0.03931  -2.769 0.005770 ** 
xzh         -0.09173    0.03931  -2.334 0.019908 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03209 on 674 degrees of freedom
Multiple R-squared:  0.1482,	Adjusted R-squared:  0.1014 
F-statistic: 3.169 on 37 and 674 DF,  p-value: 0.00000000266