According to this company's balance sheet, calculate the company's 2020 leverage ratio. Leverage = average NNO / Average Equity (where NNO = Net Non-operating obligation). You can assume that 'investments in other entities', 'other assets' and 'other liabilities' are all operating items.

2020 SM 2019 SM NOTES 6 7 8 24 438 305 106 38 3 119 1,055 564 81 48 9 56 Current Assets Bank and short-term deposits Trade and other receivables Inventories Derivative financial assets Income taxation Other assets Total Current Assets Non-Current Assets Trade and other receivables Property, plant and equipment Right of use assets Intangible assets Investments in other entities Other assets 1,009 1,804 64 5,133 7 10 11 12 13 9 142 3,336 2,357 186 162 351 186 149 285 5,817 Total Non-Current Assets Total Assets 6,534 7,543 7,621 585 1,372 307 14 15 16 24 17 322 828 160 353 116 104 32 105 25 240 2,666 18 Current Liabilities Trade and other payables Revenue in advance Interest-bearing liabilities Lease liabilities Derivative financial liabilities Provisions Income taxation Other liabilities Total Current Liabilities Non-Current Liabilities Revenue in advance Interest-bearing liabilities Lease liabilities Provisions Other liabilities Deferred taxation 219 2,102 200 2,290 14 15 16 17 18 4 491 1,303 1,885 295 32 117 4,123 165 42 266 2.963 Total Non-Current Liabilities Total Liabilities 6,225 5,629 1,992 Net Assets 1,318 Equity Share capital Reserves Total Equity 20 21 2.209 (891) 1,318 2.219 (227) 1,992