Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.061497 -0.021818 -0.000087  0.019705  0.111272 

Coefficients:
             Estimate Std. Error t value           Pr(>|t|)    
(Intercept)  0.047192   0.005505   8.573 0.0000000000000144 ***
xAmericas   -0.001684   0.009059  -0.186             0.8528    
xAsia        0.014329   0.008175   1.753             0.0818 .  
xEurope     -0.005349   0.007833  -0.683             0.4958    
xOceania    -0.014516   0.012431  -1.168             0.2448    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03525 on 144 degrees of freedom
Multiple R-squared:  0.05419,	Adjusted R-squared:  0.02791 
F-statistic: 2.062 on 4 and 144 DF,  p-value: 0.08878