Bouygues shows long-term borrowings of 11.586 bn and current borrowings around 1.361 bn, with significant equity of 12.212 bn and retained earnings etc. There is also substantial lease liabilities and noncurrent liabilities. The data provided does not separately identify hybrid bonds (perpetual/convertible) but shows current and non-current borrowings, and financing activities. In absence of explicit hybrid instruments, their reliance on hybrid bonds appears low. Therefore choose 0%. 
<answer>0%</answer>