Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.124407 -0.032782 -0.003186  0.024914  0.216642 

Coefficients:
                     Estimate Std. Error t value Pr(>|t|)   
(Intercept)          0.019980   0.044643   0.448  0.65524   
xCaribbean           0.146823   0.049912   2.942  0.00389 **
xCentral America     0.069893   0.050620   1.381  0.16980   
xCentral Asia        0.058414   0.057634   1.014  0.31274   
xEastern Africa      0.088063   0.047725   1.845  0.06736 . 
xEastern Asia        0.006721   0.054676   0.123  0.90237   
xEastern Europe      0.012835   0.049355   0.260  0.79524   
xMelanesia           0.117856   0.054676   2.156  0.03302 * 
xMicronesia          0.153042   0.063134   2.424  0.01677 * 
xMiddle Africa       0.108193   0.051549   2.099  0.03783 * 
xNA                 -0.019947   0.077324  -0.258  0.79685   
xNorthern Africa     0.050743   0.054676   0.928  0.35514   
xNorthern America   -0.003842   0.063134  -0.061  0.95157   
xNorthern Europe    -0.019811   0.048904  -0.405  0.68609   
xPolynesia           0.196866   0.063134   3.118  0.00226 **
xSouth America       0.037306   0.050620   0.737  0.46251   
xSouth-Eastern Asia  0.114469   0.049912   2.293  0.02348 * 
xSouthern Africa     0.078322   0.057634   1.359  0.17658   
xSouthern Asia       0.103465   0.051549   2.007  0.04688 * 
xSouthern Europe     0.023266   0.048220   0.483  0.63028   
xWestern Africa      0.100075   0.047725   2.097  0.03800 * 
xWestern Asia        0.053991   0.047954   1.126  0.26235   
xWestern Europe      0.002870   0.049912   0.058  0.95424   
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.06313 on 126 degrees of freedom
Multiple R-squared:  0.4271,	Adjusted R-squared:  0.3271 
F-statistic:  4.27 on 22 and 126 DF,  p-value: 0.00000009014