Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.25695 -0.01685 -0.01087 -0.00101  0.35782 

Coefficients:
             Estimate Std. Error t value            Pr(>|t|)    
(Intercept)  0.010887   0.007816   1.393               0.164    
xAmericas    0.246064   0.010944  22.484 <0.0000000000000002 ***
xAsia       -0.007780   0.010802  -0.720               0.472    
xEurope      0.005967   0.009385   0.636               0.525    
xOceania    -0.009797   0.013731  -0.713               0.476    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.08598 on 707 degrees of freedom
Multiple R-squared:  0.5465,	Adjusted R-squared:  0.544 
F-statistic:   213 on 4 and 707 DF,  p-value: < 0.00000000000000022