Call:
lm(formula = y ~ x)

Residuals:
     Min       1Q   Median       3Q      Max 
-0.45678 -0.10697  0.04079  0.07940  0.44977 

Coefficients:
             Estimate Std. Error t value            Pr(>|t|)    
(Intercept)   0.74372    0.02524  29.465 <0.0000000000000002 ***
xNA           0.04079    0.15964   0.256               0.799    
xnon-Annex I -0.34829    0.02941 -11.842 <0.0000000000000002 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.1576 on 146 degrees of freedom
Multiple R-squared:  0.4961,	Adjusted R-squared:  0.4892 
F-statistic: 71.88 on 2 and 146 DF,  p-value: < 0.00000000000000022