Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.063351 -0.009535 -0.002985  0.000214  0.225814 

Coefficients:
                      Estimate Std. Error t value   Pr(>|t|)    
(Intercept)          0.0211403  0.0075636   2.795   0.005334 ** 
xCaribbean           0.0423013  0.0093250   4.536 0.00000675 ***
xCentral America    -0.0091525  0.0087925  -1.041   0.298268    
xCentral Asia       -0.0211301  0.0118255  -1.787   0.074406 .  
xEastern Africa     -0.0047654  0.0085869  -0.555   0.579099    
xEastern Asia       -0.0129026  0.0092635  -1.393   0.164117    
xEastern Europe     -0.0208140  0.0087064  -2.391   0.017086 *  
xMelanesia           0.0194531  0.0103339   1.882   0.060194 .  
xMicronesia          0.0387138  0.0103339   3.746   0.000194 ***
xMiddle Africa      -0.0008163  0.0106966  -0.076   0.939192    
xNA                 -0.0187971  0.0094627  -1.986   0.047380 *  
xNorthern Africa    -0.0073263  0.0114708  -0.639   0.523235    
xNorthern America   -0.0172711  0.0118255  -1.460   0.144610    
xNorthern Europe    -0.0177650  0.0081550  -2.178   0.029714 *  
xPolynesia           0.0420715  0.0103339   4.071 0.00005219 ***
xSouth America      -0.0143333  0.0084101  -1.704   0.088778 .  
xSouth-Eastern Asia  0.0105008  0.0086088   1.220   0.222965    
xSouthern Africa    -0.0181525  0.0109171  -1.663   0.096816 .  
xSouthern Asia       0.0135923  0.0092061   1.476   0.140281    
xSouthern Europe    -0.0179261  0.0084250  -2.128   0.033714 *  
xWestern Africa     -0.0011781  0.0086803  -0.136   0.892078    
xWestern Asia       -0.0081756  0.0092061  -0.888   0.374820    
xWestern Europe     -0.0193623  0.0081772  -2.368   0.018168 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.02727 on 689 degrees of freedom
Multiple R-squared:  0.2931,	Adjusted R-squared:  0.2705 
F-statistic: 12.99 on 22 and 689 DF,  p-value: < 0.00000000000000022