Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.39174 -0.08796  0.00068  0.08030  0.34597 

Coefficients:
            Estimate Std. Error t value             Pr(>|t|)    
(Intercept)  0.08797    0.02163   4.067             0.000078 ***
xAmericas    0.03403    0.03559   0.956                0.341    
xAsia        0.04722    0.03212   1.470                0.144    
xEurope      0.30379    0.03078   9.871 < 0.0000000000000002 ***
xOceania     0.05959    0.04884   1.220                0.224    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.1385 on 144 degrees of freedom
Multiple R-squared:  0.4529,	Adjusted R-squared:  0.4377 
F-statistic:  29.8 on 4 and 144 DF,  p-value: < 0.00000000000000022