Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.05757 -0.02317 -0.01221  0.00604  0.59038 

Coefficients:
             Estimate Std. Error t value      Pr(>|t|)    
(Intercept)  0.030406   0.005166   5.886 0.00000000613 ***
xAmericas    0.010781   0.007233   1.490      0.136561    
xAsia        0.027166   0.007140   3.805      0.000154 ***
xEurope     -0.007224   0.006203  -1.165      0.244561    
xOceania    -0.007397   0.009076  -0.815      0.415363    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.05683 on 707 degrees of freedom
Multiple R-squared:  0.05034,	Adjusted R-squared:  0.04497 
F-statistic:  9.37 on 4 and 707 DF,  p-value: 0.0000002207