To estimate the FFO / Net Debt ratio for 2022, we need to calculate the Funds From Operations (FFO) and the Net Debt for the year 2022 using the provided facts.

**1. Calculate FFO (Funds From Operations):**
A common standard formula for FFO is:
FFO = Profit Loss Attributable To Owners Of Parent + Depreciation, Amortisation And Impairment Loss
From the income statement facts for 2022 (the period 2022-01-01 to 2023-01-01):
- Profit Loss Attributable To Owners Of Parent = 4,339,000,000 EUR
- Depreciation Amortisation And Impairment Loss Reversal Of Impairment Loss Recognised In Profit Or Loss = 4,774,000,000 EUR

FFO = 4,339,000,000 + 4,774,000,000 = 9,113,000,000 EUR

**2. Calculate Net Debt:**
The formula for Net Debt is:
Net Debt = Total Financial Liabilities (Current + Noncurrent) - Cash And Cash Equivalents
From the balance sheet facts at the end of 2022 (2023-01-01):
- Noncurrent Financial Liabilities = 44,216,000,000 EUR
- Current Financial Liabilities = 25,079,000,000 EUR
- Cash And Cash Equivalents = 4,608,000,000 EUR

Total Financial Liabilities = 44,216,000,000 + 25,079,000,000 = 69,295,000,000 EUR
Net Debt = 69,295,000,000 - 4,608,000,000 = 64,687,000,000 EUR

**3. Calculate FFO / Net Debt Ratio:**
FFO / Net Debt = 9,113,000,000 / 64,687,000,000 ≈ 0.1409

<answer>0.14</answer>