Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.04294 -0.01960 -0.01185  0.01021  0.16480 

Coefficients:
                     Estimate Std. Error t value Pr(>|t|)   
(Intercept)          0.014009   0.009217   1.520  0.12899   
xCaribbean           0.026793   0.011364   2.358  0.01866 * 
xCentral America     0.028716   0.010715   2.680  0.00754 **
xCentral Asia        0.015814   0.014411   1.097  0.27286   
xEastern Africa      0.005351   0.010464   0.511  0.60925   
xEastern Asia        0.006209   0.011289   0.550  0.58246   
xEastern Europe      0.007332   0.010610   0.691  0.48976   
xMelanesia           0.010655   0.012593   0.846  0.39781   
xMicronesia          0.019782   0.012593   1.571  0.11667   
xMiddle Africa       0.001964   0.013035   0.151  0.88027   
xNA                  0.010636   0.011532   0.922  0.35668   
xNorthern Africa     0.001117   0.013979   0.080  0.93632   
xNorthern America    0.026374   0.014411   1.830  0.06766 . 
xNorthern Europe     0.009871   0.009938   0.993  0.32093   
xPolynesia           0.010407   0.012593   0.826  0.40885   
xSouth America       0.020519   0.010249   2.002  0.04567 * 
xSouth-Eastern Asia  0.011570   0.010491   1.103  0.27046   
xSouthern Africa     0.028935   0.013304   2.175  0.02998 * 
xSouthern Asia       0.003333   0.011219   0.297  0.76647   
xSouthern Europe    -0.002151   0.010267  -0.210  0.83410   
xWestern Africa      0.006898   0.010578   0.652  0.51457   
xWestern Asia        0.002953   0.011219   0.263  0.79247   
xWestern Europe      0.004120   0.009965   0.413  0.67943   
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03323 on 689 degrees of freedom
Multiple R-squared:  0.06489,	Adjusted R-squared:  0.03504 
F-statistic: 2.173 on 22 and 689 DF,  p-value: 0.001515