Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.06960 -0.02143 -0.01106  0.00677  0.47816 

Coefficients:
                     Estimate Std. Error t value  Pr(>|t|)    
(Intercept)          0.005121   0.013286   0.385   0.70001    
xCaribbean           0.040393   0.016380   2.466   0.01391 *  
xCentral America     0.005525   0.015445   0.358   0.72066    
xCentral Asia        0.061413   0.020773   2.956   0.00322 ** 
xEastern Africa      0.016745   0.015084   1.110   0.26734    
xEastern Asia        0.005949   0.016272   0.366   0.71480    
xEastern Europe      0.064492   0.015294   4.217 0.0000281 ***
xMelanesia           0.015620   0.018152   0.860   0.38982    
xMicronesia          0.025786   0.018152   1.421   0.15591    
xMiddle Africa       0.023827   0.018790   1.268   0.20519    
xNA                  0.008813   0.016622   0.530   0.59613    
xNorthern Africa     0.034392   0.020150   1.707   0.08830 .  
xNorthern America   -0.001996   0.020773  -0.096   0.92347    
xNorthern Europe     0.012086   0.014325   0.844   0.39913    
xPolynesia           0.013434   0.018152   0.740   0.45950    
xSouth America       0.024575   0.014773   1.663   0.09668 .  
xSouth-Eastern Asia  0.033103   0.015122   2.189   0.02893 *  
xSouthern Africa     0.004545   0.019177   0.237   0.81271    
xSouthern Asia       0.006195   0.016171   0.383   0.70179    
xSouthern Europe     0.028543   0.014799   1.929   0.05418 .  
xWestern Africa      0.013263   0.015248   0.870   0.38471    
xWestern Asia        0.051578   0.016171   3.189   0.00149 ** 
xWestern Europe      0.016325   0.014364   1.137   0.25614    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.0479 on 689 degrees of freedom
Multiple R-squared:  0.1059,	Adjusted R-squared:  0.07732 
F-statistic: 3.708 on 22 and 689 DF,  p-value: 0.00000003186