Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.027502 -0.020856 -0.007871  0.002962  0.192813 

Coefficients:
            Estimate Std. Error t value       Pr(>|t|)    
(Intercept) 0.004468   0.002953   1.513          0.131    
xAmericas   0.004571   0.004134   1.106          0.269    
xAsia       0.020408   0.004081   5.001 0.000000719805 ***
xEurope     0.023034   0.003545   6.497 0.000000000155 ***
xOceania    0.003519   0.005187   0.678          0.498    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.03248 on 707 degrees of freedom
Multiple R-squared:  0.08476,	Adjusted R-squared:  0.07958 
F-statistic: 16.37 on 4 and 707 DF,  p-value: 0.0000000000007831