Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.159012 -0.033195 -0.003472  0.028721  0.224493 

Coefficients:
                     Estimate Std. Error t value Pr(>|t|)   
(Intercept)          0.016448   0.044246   0.372  0.71071   
xCaribbean           0.106195   0.049469   2.147  0.03373 * 
xCentral America     0.096380   0.050171   1.921  0.05698 . 
xCentral Asia        0.180702   0.057122   3.163  0.00195 **
xEastern Africa      0.136082   0.047301   2.877  0.00472 **
xEastern Asia        0.042725   0.054190   0.788  0.43193   
xEastern Europe      0.025195   0.048916   0.515  0.60740   
xMelanesia           0.111868   0.054190   2.064  0.04104 * 
xMicronesia          0.029623   0.062574   0.473  0.63674   
xMiddle Africa       0.127217   0.051091   2.490  0.01408 * 
xNA                  0.003775   0.076637   0.049  0.96079   
xNorthern Africa     0.089802   0.054190   1.657  0.09997 . 
xNorthern America    0.012287   0.062574   0.196  0.84465   
xNorthern Europe     0.002964   0.048469   0.061  0.95134   
xPolynesia           0.029651   0.062574   0.474  0.63642   
xSouth America       0.067616   0.050171   1.348  0.18017   
xSouth-Eastern Asia  0.142581   0.049469   2.882  0.00464 **
xSouthern Africa     0.082057   0.057122   1.437  0.15333   
xSouthern Asia       0.108731   0.051091   2.128  0.03527 * 
xSouthern Europe     0.036971   0.047791   0.774  0.44063   
xWestern Africa      0.109730   0.047301   2.320  0.02196 * 
xWestern Asia        0.094821   0.047528   1.995  0.04819 * 
xWestern Europe     -0.001277   0.049469  -0.026  0.97944   
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.06257 on 126 degrees of freedom
Multiple R-squared:  0.4199,	Adjusted R-squared:  0.3186 
F-statistic: 4.146 on 22 and 126 DF,  p-value: 0.0000001688