Call:
lm(formula = y ~ x)

Residuals:
      Min        1Q    Median        3Q       Max 
-0.173073 -0.041578  0.002291  0.023434  0.307156 

Coefficients:
             Estimate Std. Error t value            Pr(>|t|)    
(Intercept)   0.24457    0.01042  23.472 <0.0000000000000002 ***
xNA           0.02343    0.06590   0.356               0.723    
xnon-Annex I -0.15845    0.01214 -13.050 <0.0000000000000002 ***
---
Signif. codes:  0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05 ‘.’ 0.1 ‘ ’ 1

Residual standard error: 0.06507 on 146 degrees of freedom
Multiple R-squared:  0.545,	Adjusted R-squared:  0.5388 
F-statistic: 87.46 on 2 and 146 DF,  p-value: < 0.00000000000000022