Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.05905 -0.02470 -0.01883  0.01638  0.25902 

Coefficients:
             Estimate Std. Error t value           Pr(>|t|)    
(Intercept)  0.059059   0.006907   8.551 0.0000000000000163 ***
xAmericas   -0.030771   0.011367  -2.707            0.00761 ** 
xAsia       -0.027113   0.010258  -2.643            0.00913 ** 
xEurope     -0.040211   0.009829  -4.091 0.0000711491429519 ***
xOceania    -0.003037   0.015598  -0.195            0.84591    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04423 on 144 degrees of freedom
Multiple R-squared:  0.1228,	Adjusted R-squared:  0.09846 
F-statistic: 5.041 on 4 and 144 DF,  p-value: 0.0007859