Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.216505 -0.041122  0.002239  0.038621  0.265444 

Coefficients:
            Estimate Std. Error t value             Pr(>|t|)    
(Intercept) 0.079824   0.011526   6.926 0.000000000133210930 ***
xAmericas   0.021854   0.018968   1.152               0.2512    
xAsia       0.009164   0.017118   0.535               0.5933    
xEurope     0.149563   0.016401   9.119 0.000000000000000606 ***
xOceania    0.048131   0.026029   1.849               0.0665 .  
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.0738 on 144 degrees of freedom
Multiple R-squared:  0.4228,	Adjusted R-squared:  0.4068 
F-statistic: 26.37 on 4 and 144 DF,  p-value: < 0.00000000000000022