Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.029567 -0.010849 -0.005231  0.003528  0.212625 

Coefficients:
                     Estimate Std. Error t value Pr(>|t|)  
(Intercept)          0.015390   0.006849   2.247   0.0250 *
xCaribbean          -0.008812   0.008445  -1.044   0.2971  
xCentral America     0.002568   0.007962   0.322   0.7472  
xCentral Asia       -0.011746   0.010709  -1.097   0.2731  
xEastern Africa      0.002733   0.007776   0.351   0.7254  
xEastern Asia       -0.006425   0.008389  -0.766   0.4440  
xEastern Europe     -0.006732   0.007884  -0.854   0.3935  
xMelanesia           0.014180   0.009358   1.515   0.1302  
xMicronesia         -0.015345   0.009358  -1.640   0.1015  
xMiddle Africa       0.005641   0.009687   0.582   0.5605  
xNA                 -0.010803   0.008569  -1.261   0.2079  
xNorthern Africa    -0.004542   0.010388  -0.437   0.6621  
xNorthern America    0.002221   0.010709   0.207   0.8357  
xNorthern Europe    -0.001910   0.007385  -0.259   0.7960  
xPolynesia          -0.012116   0.009358  -1.295   0.1959  
xSouth America       0.013662   0.007616   1.794   0.0733 .
xSouth-Eastern Asia  0.006821   0.007796   0.875   0.3819  
xSouthern Africa    -0.004713   0.009886  -0.477   0.6337  
xSouthern Asia      -0.002762   0.008337  -0.331   0.7405  
xSouthern Europe    -0.009062   0.007630  -1.188   0.2354  
xWestern Africa     -0.000499   0.007861  -0.063   0.9494  
xWestern Asia       -0.009954   0.008337  -1.194   0.2329  
xWestern Europe     -0.010135   0.007405  -1.369   0.1716  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.0247 on 689 degrees of freedom
Multiple R-squared:  0.09209,	Adjusted R-squared:  0.0631 
F-statistic: 3.177 on 22 and 689 DF,  p-value: 0.000001615