Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.38605 -0.08740 -0.00754  0.04412  0.36892 

Coefficients:
             Estimate Std. Error t value            Pr(>|t|)    
(Intercept)   0.42794    0.01834   23.33 <0.0000000000000002 ***
xNA           0.04412    0.11601    0.38               0.704    
xnon-Annex I -0.32597    0.02137  -15.25 <0.0000000000000002 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.1146 on 146 degrees of freedom
Multiple R-squared:  0.6205,	Adjusted R-squared:  0.6153 
F-statistic: 119.3 on 2 and 146 DF,  p-value: < 0.00000000000000022