Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.04646 -0.02763 -0.01983  0.01574  0.23767 

Coefficients:
             Estimate Std. Error t value             Pr(>|t|)    
(Intercept)  0.046461   0.004049  11.474 < 0.0000000000000002 ***
xAmericas   -0.011606   0.005669  -2.047               0.0410 *  
xAsia       -0.007725   0.005596  -1.380               0.1679    
xEurope     -0.026483   0.004862  -5.447         0.0000000707 ***
xOceania    -0.015446   0.007114  -2.171               0.0302 *  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04454 on 707 degrees of freedom
Multiple R-squared:  0.04873,	Adjusted R-squared:  0.04335 
F-statistic: 9.054 on 4 and 707 DF,  p-value: 0.00000039