Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.05901 -0.02239 -0.00895  0.00681  0.32259 

Coefficients:
             Estimate Std. Error t value             Pr(>|t|)    
(Intercept)  0.052134   0.004237  12.303 < 0.0000000000000002 ***
xAmericas   -0.029728   0.005933  -5.011          0.000000686 ***
xAsia       -0.007277   0.005856  -1.243                0.214    
xEurope     -0.043167   0.005088  -8.485 < 0.0000000000000002 ***
xOceania     0.006879   0.007444   0.924                0.356    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.04661 on 707 degrees of freedom
Multiple R-squared:  0.1475,	Adjusted R-squared:  0.1427 
F-statistic: 30.58 on 4 and 707 DF,  p-value: < 0.00000000000000022