Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.08399 -0.02670 -0.01741  0.01425  0.24177 

Coefficients:
             Estimate Std. Error t value      Pr(>|t|)    
(Intercept)  0.048338   0.007722   6.260 0.00000000417 ***
xAmericas    0.003473   0.012708   0.273       0.78502    
xAsia       -0.006507   0.011468  -0.567       0.57132    
xEurope     -0.030883   0.010988  -2.811       0.00564 ** 
xOceania     0.035665   0.017438   2.045       0.04265 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04944 on 144 degrees of freedom
Multiple R-squared:  0.1148,	Adjusted R-squared:  0.09023 
F-statistic:  4.67 on 4 and 144 DF,  p-value: 0.001423