Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.17717 -0.02231 -0.00235  0.00487  0.38148 

Coefficients:
                      Estimate Std. Error t value             Pr(>|t|)    
(Intercept)          0.0392292  0.0159382   2.461              0.01409 *  
xCaribbean          -0.0344483  0.0196499  -1.753              0.08003 .  
xCentral America    -0.0368797  0.0185278  -1.991              0.04693 *  
xCentral Asia        0.0022419  0.0249189   0.090              0.92834    
xEastern Africa     -0.0378862  0.0180945  -2.094              0.03664 *  
xEastern Asia       -0.0103045  0.0195202  -0.528              0.59775    
xEastern Europe      0.0383415  0.0183462   2.090              0.03699 *  
xMelanesia          -0.0345151  0.0217757  -1.585              0.11342    
xMicronesia         -0.0337688  0.0217757  -1.551              0.12142    
xMiddle Africa      -0.0392016  0.0225400  -1.739              0.08245 .  
xNA                  0.1991633  0.0199400   9.988 < 0.0000000000000002 ***
xNorthern Africa    -0.0374307  0.0241715  -1.549              0.12195    
xNorthern America   -0.0004124  0.0249189  -0.017              0.98680    
xNorthern Europe     0.0482648  0.0171844   2.809              0.00512 ** 
xPolynesia          -0.0305868  0.0217757  -1.405              0.16058    
xSouth America      -0.0319173  0.0177220  -1.801              0.07214 .  
xSouth-Eastern Asia -0.0297380  0.0181405  -1.639              0.10160    
xSouthern Africa    -0.0351069  0.0230048  -1.526              0.12745    
xSouthern Asia      -0.0377906  0.0193993  -1.948              0.05182 .  
xSouthern Europe     0.0184903  0.0177533   1.042              0.29800    
xWestern Africa     -0.0373432  0.0182913  -2.042              0.04157 *  
xWestern Asia        0.0131228  0.0193993   0.676              0.49898    
xWestern Europe      0.0364389  0.0172312   2.115              0.03481 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.05747 on 689 degrees of freedom
Multiple R-squared:  0.4298,	Adjusted R-squared:  0.4116 
F-statistic: 23.61 on 22 and 689 DF,  p-value: < 0.00000000000000022