Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.05520 -0.01779 -0.00934  0.00413  0.53350 

Coefficients:
                     Estimate Std. Error t value  Pr(>|t|)    
(Intercept)          0.050062   0.012015   4.167 0.0000348 ***
xCaribbean          -0.026713   0.014813  -1.803   0.07178 .  
xCentral America    -0.025194   0.013967  -1.804   0.07171 .  
xCentral Asia       -0.031719   0.018785  -1.688   0.09177 .  
xEastern Africa     -0.023919   0.013641  -1.754   0.07996 .  
xEastern Asia       -0.036958   0.014715  -2.512   0.01225 *  
xEastern Europe     -0.025278   0.013830  -1.828   0.06802 .  
xMelanesia          -0.034878   0.016416  -2.125   0.03397 *  
xMicronesia         -0.044135   0.016416  -2.689   0.00735 ** 
xMiddle Africa      -0.028683   0.016992  -1.688   0.09186 .  
xNA                  0.005149   0.015032   0.343   0.73206    
xNorthern Africa    -0.034568   0.018222  -1.897   0.05824 .  
xNorthern America   -0.029980   0.018785  -1.596   0.11096    
xNorthern Europe    -0.031690   0.012955  -2.446   0.01468 *  
xPolynesia          -0.039918   0.016416  -2.432   0.01528 *  
xSouth America      -0.029066   0.013360  -2.176   0.02992 *  
xSouth-Eastern Asia -0.041529   0.013675  -3.037   0.00248 ** 
xSouthern Africa    -0.031335   0.017342  -1.807   0.07122 .  
xSouthern Asia      -0.034636   0.014624  -2.368   0.01814 *  
xSouthern Europe    -0.031060   0.013384  -2.321   0.02059 *  
xWestern Africa     -0.037818   0.013789  -2.743   0.00625 ** 
xWestern Asia       -0.020521   0.014624  -1.403   0.16101    
xWestern Europe     -0.032270   0.012990  -2.484   0.01322 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04332 on 689 degrees of freedom
Multiple R-squared:  0.04588,	Adjusted R-squared:  0.01542 
F-statistic: 1.506 on 22 and 689 DF,  p-value: 0.06434