Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.10978 -0.01873 -0.00720 -0.00019  0.42847 

Coefficients:
                    Estimate Std. Error t value         Pr(>|t|)    
(Intercept)          0.10978    0.01540   7.130 0.00000000000254 ***
xCaribbean          -0.09803    0.01898  -5.165 0.00000031570108 ***
xCentral America    -0.10911    0.01790  -6.096 0.00000000180708 ***
xCentral Asia       -0.10977    0.02407  -4.560 0.00000605150498 ***
xEastern Africa     -0.09494    0.01748  -5.432 0.00000007739383 ***
xEastern Asia       -0.10454    0.01886  -5.544 0.00000004218474 ***
xEastern Europe     -0.10860    0.01772  -6.128 0.00000000149894 ***
xMelanesia          -0.08191    0.02104  -3.894         0.000108 ***
xMicronesia         -0.08510    0.02104  -4.046 0.00005810654689 ***
xMiddle Africa      -0.10977    0.02177  -5.042 0.00000059067487 ***
xNA                 -0.07320    0.01926  -3.800         0.000157 ***
xNorthern Africa    -0.10911    0.02335  -4.673 0.00000357404456 ***
xNorthern America   -0.03877    0.02407  -1.611         0.107715    
xNorthern Europe    -0.03980    0.01660  -2.397         0.016777 *  
xPolynesia          -0.10234    0.02104  -4.865 0.00000141905513 ***
xSouth America      -0.10182    0.01712  -5.948 0.00000000432424 ***
xSouth-Eastern Asia -0.08255    0.01752  -4.711 0.00000298731266 ***
xSouthern Africa    -0.07830    0.02222  -3.524         0.000454 ***
xSouthern Asia      -0.09883    0.01874  -5.274 0.00000017895844 ***
xSouthern Europe    -0.10039    0.01715  -5.854 0.00000000743805 ***
xWestern Africa     -0.10258    0.01767  -5.806 0.00000000979095 ***
xWestern Asia       -0.10373    0.01874  -5.535 0.00000004416819 ***
xWestern Europe     -0.07881    0.01665  -4.735 0.00000266126932 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.05551 on 689 degrees of freedom
Multiple R-squared:  0.1661,	Adjusted R-squared:  0.1395 
F-statistic: 6.237 on 22 and 689 DF,  p-value: < 0.00000000000000022