Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.12808 -0.01607 -0.00843  0.00333  0.40499 

Coefficients:
                     Estimate Std. Error t value      Pr(>|t|)    
(Intercept)          0.015062   0.012025   1.252         0.211    
xCaribbean          -0.001307   0.014826  -0.088         0.930    
xCentral America     0.006970   0.013979   0.499         0.618    
xCentral Asia        0.113038   0.018801   6.012 0.00000000297 ***
xEastern Africa     -0.009508   0.013652  -0.696         0.486    
xEastern Asia        0.001300   0.014728   0.088         0.930    
xEastern Europe      0.064563   0.013842   4.664 0.00000372141 ***
xMelanesia          -0.012046   0.016430  -0.733         0.464    
xMicronesia         -0.012436   0.016430  -0.757         0.449    
xMiddle Africa      -0.012911   0.017006  -0.759         0.448    
xNA                 -0.007259   0.015045  -0.482         0.630    
xNorthern Africa     0.002030   0.018237   0.111         0.911    
xNorthern America   -0.012215   0.018801  -0.650         0.516    
xNorthern Europe     0.001012   0.012966   0.078         0.938    
xPolynesia          -0.013984   0.016430  -0.851         0.395    
xSouth America      -0.004053   0.013371  -0.303         0.762    
xSouth-Eastern Asia -0.006525   0.013687  -0.477         0.634    
xSouthern Africa    -0.007790   0.017357  -0.449         0.654    
xSouthern Asia      -0.006591   0.014637  -0.450         0.653    
xSouthern Europe     0.009735   0.013395   0.727         0.468    
xWestern Africa     -0.003396   0.013801  -0.246         0.806    
xWestern Asia        0.019892   0.014637   1.359         0.175    
xWestern Europe      0.006789   0.013001   0.522         0.602    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04336 on 689 degrees of freedom
Multiple R-squared:  0.1933,	Adjusted R-squared:  0.1675 
F-statistic: 7.503 on 22 and 689 DF,  p-value: < 0.00000000000000022