Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.07578 -0.01871 -0.00849  0.00621  0.54050 

Coefficients:
                     Estimate Std. Error t value  Pr(>|t|)    
(Intercept)          0.006317   0.015159   0.417  0.677040    
xCaribbean           0.027831   0.018690   1.489  0.136913    
xCentral America     0.047930   0.017623   2.720  0.006696 ** 
xCentral Asia        0.041769   0.023701   1.762  0.078466 .  
xEastern Africa      0.018905   0.017210   1.098  0.272387    
xEastern Asia        0.010823   0.018567   0.583  0.560147    
xEastern Europe      0.066744   0.017450   3.825  0.000143 ***
xMelanesia           0.015468   0.020712   0.747  0.455422    
xMicronesia          0.014742   0.020712   0.712  0.476841    
xMiddle Africa       0.032401   0.021439   1.511  0.131159    
xNA                 -0.006275   0.018966  -0.331  0.740842    
xNorthern Africa     0.030415   0.022991   1.323  0.186293    
xNorthern America    0.003748   0.023701   0.158  0.874398    
xNorthern Europe     0.012393   0.016345   0.758  0.448568    
xPolynesia           0.034336   0.020712   1.658  0.097817 .  
xSouth America       0.034377   0.016856   2.039  0.041789 *  
xSouth-Eastern Asia  0.069132   0.017254   4.007 0.0000683 ***
xSouthern Africa     0.003800   0.021881   0.174  0.862173    
xSouthern Asia       0.046011   0.018452   2.494  0.012878 *  
xSouthern Europe     0.011138   0.016886   0.660  0.509712    
xWestern Africa      0.031540   0.017398   1.813  0.070284 .  
xWestern Asia        0.069466   0.018452   3.765  0.000181 ***
xWestern Europe      0.006529   0.016389   0.398  0.690484    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.05466 on 689 degrees of freedom
Multiple R-squared:  0.1439,	Adjusted R-squared:  0.1165 
F-statistic: 5.263 on 22 and 689 DF,  p-value: 0.0000000000001995