Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.211188 -0.038276  0.008195  0.037002  0.195620 

Coefficients:
                    Estimate Std. Error t value Pr(>|t|)    
(Intercept)          0.19035    0.04950   3.845  0.00019 ***
xCaribbean          -0.07334    0.05535  -1.325  0.18750    
xCentral America    -0.12422    0.05613  -2.213  0.02870 *  
xCentral Asia       -0.13767    0.06391  -2.154  0.03312 *  
xEastern Africa     -0.10174    0.05292  -1.922  0.05680 .  
xEastern Asia       -0.10629    0.06063  -1.753  0.08202 .  
xEastern Europe      0.03621    0.05473   0.662  0.50935    
xMelanesia          -0.11455    0.06063  -1.889  0.06113 .  
xMicronesia          0.02468    0.07001   0.353  0.72499    
xMiddle Africa      -0.12062    0.05716  -2.110  0.03681 *  
xNA                  0.07766    0.08574   0.906  0.36679    
xNorthern Africa    -0.12561    0.06063  -2.072  0.04033 *  
xNorthern America   -0.10087    0.07001  -1.441  0.15212    
xNorthern Europe     0.06947    0.05423   1.281  0.20254    
xPolynesia          -0.10753    0.07001  -1.536  0.12704    
xSouth America      -0.06715    0.05613  -1.196  0.23382    
xSouth-Eastern Asia -0.13873    0.05535  -2.507  0.01346 *  
xSouthern Africa    -0.01997    0.06391  -0.312  0.75524    
xSouthern Asia      -0.12671    0.05716  -2.217  0.02844 *  
xSouthern Europe    -0.00344    0.05347  -0.064  0.94880    
xWestern Africa     -0.13007    0.05292  -2.458  0.01534 *  
xWestern Asia       -0.05676    0.05318  -1.067  0.28780    
xWestern Europe      0.06308    0.05535   1.140  0.25657    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.07001 on 126 degrees of freedom
Multiple R-squared:  0.5456,	Adjusted R-squared:  0.4662 
F-statistic: 6.876 on 22 and 126 DF,  p-value: 0.0000000000004387