Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.047061 -0.016471 -0.002360  0.001233  0.241962 

Coefficients:
             Estimate Std. Error t value       Pr(>|t|)    
(Intercept)  0.016475   0.002676   6.156 0.000000001251 ***
xAmericas    0.002880   0.003747   0.769          0.442    
xAsia        0.005286   0.003699   1.429          0.153    
xEurope     -0.014112   0.003213  -4.392 0.000012965412 ***
xOceania     0.030589   0.004702   6.506 0.000000000146 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.02944 on 707 degrees of freedom
Multiple R-squared:  0.1547,	Adjusted R-squared:  0.1499 
F-statistic: 32.34 on 4 and 707 DF,  p-value: < 0.00000000000000022