Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.12373 -0.03574 -0.02317  0.02983  0.23492 

Coefficients:
            Estimate Std. Error t value             Pr(>|t|)    
(Intercept)  0.11074    0.01067  10.381 < 0.0000000000000002 ***
xAmericas   -0.01087    0.01755  -0.619                0.537    
xAsia       -0.01898    0.01584  -1.198                0.233    
xEurope     -0.08577    0.01518  -5.650         0.0000000829 ***
xOceania     0.02637    0.02409   1.095                0.276    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.0683 on 144 degrees of freedom
Multiple R-squared:  0.2337,	Adjusted R-squared:  0.2125 
F-statistic: 10.98 on 4 and 144 DF,  p-value: 0.00000008435