Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.231436 -0.011199 -0.011168  0.001789  0.298733 

Coefficients:
             Estimate Std. Error t value Pr(>|t|)   
(Intercept)  0.090839   0.040530   2.241  0.02533 * 
xca         -0.043501   0.046801  -0.930  0.35296   
xcs          0.095045   0.044399   2.141  0.03266 * 
xda         -0.090813   0.046801  -1.940  0.05274 . 
xde         -0.071822   0.041105  -1.747  0.08105 . 
xel         -0.000732   0.042989  -0.017  0.98642   
xen         -0.079638   0.040583  -1.962  0.05013 . 
xes         -0.071799   0.040755  -1.762  0.07857 . 
xet         -0.090827   0.046801  -1.941  0.05271 . 
xfa         -0.069021   0.049640  -1.390  0.16485   
xfi         -0.090837   0.049640  -1.830  0.06770 . 
xfr         -0.073409   0.040851  -1.797  0.07278 . 
xhr          0.036395   0.046801   0.778  0.43704   
xhu         -0.010101   0.045314  -0.223  0.82368   
xis         -0.088217   0.045314  -1.947  0.05198 . 
xit         -0.006971   0.046801  -0.149  0.88164   
xiw         -0.047166   0.049640  -0.950  0.34237   
xja         -0.090817   0.049640  -1.830  0.06776 . 
xka         -0.063618   0.044399  -1.433  0.15236   
xko         -0.076284   0.042723  -1.786  0.07462 . 
xky         -0.090819   0.057319  -1.584  0.11356   
xlt         -0.038281   0.045314  -0.845  0.39853   
xlv         -0.042400   0.045314  -0.936  0.34977   
xmng        -0.055561   0.057319  -0.969  0.33272   
xnl         -0.090780   0.044399  -2.045  0.04128 * 
xno         -0.085395   0.043329  -1.971  0.04915 * 
xpl         -0.090182   0.049640  -1.817  0.06970 . 
xpt         -0.082831   0.041484  -1.997  0.04626 * 
xro         -0.030533   0.045314  -0.674  0.50067   
xru          0.005993   0.042723   0.140  0.88849   
xsk          0.140608   0.046801   3.004  0.00276 **
xsl         -0.086520   0.045314  -1.909  0.05665 . 
xsq         -0.069025   0.057319  -1.204  0.22892   
xsr         -0.077371   0.049640  -1.559  0.11955   
xsv         -0.078858   0.043778  -1.801  0.07210 . 
xth         -0.065586   0.046801  -1.401  0.16156   
xvi         -0.057049   0.049640  -1.149  0.25085   
xzh         -0.022287   0.049640  -0.449  0.65360   
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04053 on 674 degrees of freedom
Multiple R-squared:  0.3104,	Adjusted R-squared:  0.2725 
F-statistic: 8.199 on 37 and 674 DF,  p-value: < 0.00000000000000022