Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.078841 -0.013029 -0.002397  0.003025  0.134677 

Coefficients:
                      Estimate Std. Error t value             Pr(>|t|)    
(Intercept)          0.0037167  0.0080424   0.462             0.644131    
xCaribbean           0.0245768  0.0099154   2.479             0.013426 *  
xCentral America     0.0171190  0.0093491   1.831             0.067520 .  
xCentral Asia        0.0544764  0.0125741   4.332       0.000016942686 ***
xEastern Africa      0.0593924  0.0091305   6.505       0.000000000150 ***
xEastern Asia        0.0032444  0.0098499   0.329             0.741966    
xEastern Europe     -0.0001784  0.0092575  -0.019             0.984628    
xMelanesia           0.0147291  0.0109881   1.340             0.180538    
xMicronesia          0.0076760  0.0109881   0.699             0.485051    
xMiddle Africa       0.1077798  0.0113737   9.476 < 0.0000000000000002 ***
xNA                 -0.0036906  0.0100618  -0.367             0.713885    
xNorthern Africa     0.0480362  0.0121970   3.938       0.000090381265 ***
xNorthern America    0.0029272  0.0125741   0.233             0.815989    
xNorthern Europe    -0.0013181  0.0086713  -0.152             0.879226    
xPolynesia           0.0112617  0.0109881   1.025             0.305769    
xSouth America       0.0132345  0.0089425   1.480             0.139343    
xSouth-Eastern Asia  0.0222737  0.0091537   2.433             0.015215 *  
xSouthern Africa     0.0246827  0.0116083   2.126             0.033832 *  
xSouthern Asia       0.0365888  0.0097889   3.738             0.000201 ***
xSouthern Europe    -0.0016144  0.0089584  -0.180             0.857042    
xWestern Africa      0.0594249  0.0092298   6.438       0.000000000226 ***
xWestern Asia        0.0089227  0.0097889   0.912             0.362349    
xWestern Europe     -0.0008383  0.0086949  -0.096             0.923223    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.029 on 689 degrees of freedom
Multiple R-squared:  0.4111,	Adjusted R-squared:  0.3923 
F-statistic: 21.86 on 22 and 689 DF,  p-value: < 0.00000000000000022