Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.03984 -0.03079 -0.01795  0.00702  0.36302 

Coefficients:
             Estimate Std. Error t value Pr(>|t|)    
(Intercept)  0.017959   0.004674   3.842 0.000133 ***
xAmericas    0.012854   0.006544   1.964 0.049900 *  
xAsia        0.002284   0.006459   0.354 0.723765    
xEurope      0.021884   0.005612   3.900 0.000106 ***
xOceania    -0.010047   0.008211  -1.224 0.221516    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.05141 on 707 degrees of freedom
Multiple R-squared:  0.04252,	Adjusted R-squared:  0.0371 
F-statistic: 7.849 on 4 and 707 DF,  p-value: 0.000003426