Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.33011 -0.00450 -0.00260 -0.00037  0.87998 

Coefficients:
                    Estimate Std. Error t value            Pr(>|t|)    
(Intercept)          0.33011    0.01940   17.01 <0.0000000000000002 ***
xCaribbean          -0.32571    0.02392  -13.62 <0.0000000000000002 ***
xCentral America    -0.32862    0.02256  -14.57 <0.0000000000000002 ***
xCentral Asia       -0.33006    0.03034  -10.88 <0.0000000000000002 ***
xEastern Africa     -0.32520    0.02203  -14.76 <0.0000000000000002 ***
xEastern Asia       -0.32607    0.02377  -13.72 <0.0000000000000002 ***
xEastern Europe     -0.32558    0.02234  -14.58 <0.0000000000000002 ***
xMelanesia          -0.31369    0.02651  -11.83 <0.0000000000000002 ***
xMicronesia         -0.32976    0.02651  -12.44 <0.0000000000000002 ***
xMiddle Africa      -0.32984    0.02744  -12.02 <0.0000000000000002 ***
xNA                 -0.32979    0.02428  -13.59 <0.0000000000000002 ***
xNorthern Africa    -0.33008    0.02943  -11.22 <0.0000000000000002 ***
xNorthern America   -0.31457    0.03034  -10.37 <0.0000000000000002 ***
xNorthern Europe    -0.30116    0.02092  -14.39 <0.0000000000000002 ***
xPolynesia          -0.32942    0.02651  -12.43 <0.0000000000000002 ***
xSouth America      -0.32788    0.02158  -15.20 <0.0000000000000002 ***
xSouth-Eastern Asia -0.32910    0.02209  -14.90 <0.0000000000000002 ***
xSouthern Africa    -0.30774    0.02801  -10.99 <0.0000000000000002 ***
xSouthern Asia      -0.32748    0.02362  -13.87 <0.0000000000000002 ***
xSouthern Europe    -0.32561    0.02161  -15.06 <0.0000000000000002 ***
xWestern Africa     -0.32974    0.02227  -14.81 <0.0000000000000002 ***
xWestern Asia       -0.32898    0.02362  -13.93 <0.0000000000000002 ***
xWestern Europe     -0.32649    0.02098  -15.56 <0.0000000000000002 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.06996 on 689 degrees of freedom
Multiple R-squared:  0.2924,	Adjusted R-squared:  0.2698 
F-statistic: 12.94 on 22 and 689 DF,  p-value: < 0.00000000000000022