Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.36861 -0.08038  0.00003  0.06157  0.36214 

Coefficients:
                     Estimate Std. Error t value Pr(>|t|)   
(Intercept)          0.316307   0.096862   3.266  0.00141 **
xCaribbean          -0.140110   0.108295  -1.294  0.19811   
xCentral America    -0.264370   0.109831  -2.407  0.01753 * 
xCentral Asia       -0.251301   0.125048  -2.010  0.04661 * 
xEastern Africa     -0.200198   0.103549  -1.933  0.05544 . 
xEastern Asia       -0.132966   0.118631  -1.121  0.26449   
xEastern Europe      0.057479   0.107085   0.537  0.59238   
xMelanesia          -0.204513   0.118631  -1.724  0.08717 . 
xMicronesia         -0.316268   0.136983  -2.309  0.02258 * 
xMiddle Africa      -0.224584   0.111846  -2.008  0.04679 * 
xNA                  0.155759   0.167769   0.928  0.35497   
xNorthern Africa    -0.270992   0.118631  -2.284  0.02402 * 
xNorthern America   -0.084621   0.136983  -0.618  0.53786   
xNorthern Europe     0.154627   0.106107   1.457  0.14753   
xPolynesia          -0.118474   0.136983  -0.865  0.38875   
xSouth America      -0.217530   0.109831  -1.981  0.04982 * 
xSouth-Eastern Asia -0.204213   0.108295  -1.886  0.06164 . 
xSouthern Africa    -0.189935   0.125048  -1.519  0.13129   
xSouthern Asia      -0.185228   0.111846  -1.656  0.10019   
xSouthern Europe     0.003775   0.104623   0.036  0.97127   
xWestern Africa     -0.254133   0.103549  -2.454  0.01548 * 
xWestern Asia       -0.163624   0.104046  -1.573  0.11832   
xWestern Europe      0.094194   0.108295   0.870  0.38607   
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.137 on 126 degrees of freedom
Multiple R-squared:  0.5316,	Adjusted R-squared:  0.4499 
F-statistic: 6.501 on 22 and 126 DF,  p-value: 0.000000000002287