Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.15770 -0.06380 -0.01995  0.02799  0.53563 

Coefficients:
             Estimate Std. Error t value             Pr(>|t|)    
(Intercept)  0.157699   0.009513  16.577 < 0.0000000000000002 ***
xAmericas   -0.093888   0.013319  -7.049     0.00000000000429 ***
xAsia       -0.065638   0.013146  -4.993     0.00000075006472 ***
xEurope     -0.137743   0.011422 -12.060 < 0.0000000000000002 ***
xOceania    -0.015292   0.016712  -0.915                 0.36    
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.1046 on 707 degrees of freedom
Multiple R-squared:  0.2033,	Adjusted R-squared:  0.1988 
F-statistic: 45.11 on 4 and 707 DF,  p-value: < 0.00000000000000022