Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.14513 -0.04606 -0.01402  0.02316  0.44015 

Coefficients:
            Estimate Std. Error t value    Pr(>|t|)    
(Intercept)  0.02546    0.01392   1.830    0.069346 .  
xAmericas    0.04074    0.02290   1.779    0.077325 .  
xAsia        0.09631    0.02067   4.660 0.000007130 ***
xEurope      0.10477    0.01980   5.291 0.000000444 ***
xOceania     0.11968    0.03143   3.808    0.000206 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.0891 on 144 degrees of freedom
Multiple R-squared:  0.2154,	Adjusted R-squared:  0.1936 
F-statistic: 9.882 on 4 and 144 DF,  p-value: 0.0000004295