Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.15372 -0.05025 -0.00040  0.02234  0.42107 

Coefficients:
            Estimate Std. Error t value     Pr(>|t|)    
(Intercept) 0.084521   0.014339   5.894 0.0000000256 ***
xAmericas   0.009973   0.023598   0.423     0.673206    
xAsia       0.069200   0.021297   3.249     0.001440 ** 
xEurope     0.064558   0.020405   3.164     0.001900 ** 
xOceania    0.116642   0.032382   3.602     0.000434 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.09182 on 144 degrees of freedom
Multiple R-squared:  0.1403,	Adjusted R-squared:  0.1164 
F-statistic: 5.875 on 4 and 144 DF,  p-value: 0.0002081