What is the percentage constitution of the notional amount of foreign exchange forward contracts that are less than a year among the total notional amount?
{"Foreign exchange forward contracts -- 2019": {"< 1 year": 1.0, "13 years": 1.0, "Total": "Total"}, "Foreign exchange forward contracts -- Notional Amount (USD millions)": {"< 1 year": 517.0, "13 years": 176.0, "Total": 693.0}, "Foreign exchange forward contracts -- Average forward rate (SEK/USD)": {"< 1 year": 9.13, "13 years": 8.92, "Total": "\u2013"}}
notional_amount_usd_millions_1_year = df["Foreign exchange forward contracts -- Notional Amount (USD millions)"]["< 1 year"]
notional_amount_usd_millions_total = df["Foreign exchange forward contracts -- Notional Amount (USD millions)"]["Total"]
answer = notional_amount_usd_millions_1_year / notional_amount_usd_millions_total * 100.0