Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.01950 -0.01889 -0.00252 -0.00067  0.46768 

Coefficients:
              Estimate Std. Error t value   Pr(>|t|)    
(Intercept)  0.0006765  0.0034644   0.195      0.845    
xAmericas    0.0022956  0.0048505   0.473      0.636    
xAsia        0.0018420  0.0047876   0.385      0.701    
xEurope      0.0188254  0.0041596   4.526 0.00000706 ***
xOceania    -0.0006471  0.0060861  -0.106      0.915    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03811 on 707 degrees of freedom
Multiple R-squared:  0.04938,	Adjusted R-squared:  0.044 
F-statistic: 9.181 on 4 and 707 DF,  p-value: 0.0000003104