What was the percentage change in net intangible assets?
{"Cost: -- Patents": {"2019": 1801000, "2018": 1507000}, "Cost: -- Domain name": {"2019": 22000, "2018": 22000}, "Cost: -- Client Base (1)": {"2019": 144000, "2018": 142000}, "Cost: -- Trademark (1)": {"2019": 18000, "2018": 17000}, "Cost: -- Backlog (1)": {"2019": 13000, "2018": 13000}, "Cost: -- Technology": {"2019": 77000, "2018": 77000}, "Cost: -- ": {"2019": 2075000, "2018": 1778000}, "Cost: -- Less: Accumulated amortization": {"2019": -499000, "2018": -404000}, "Cost: -- Intangible assets, net": {"2019": 1576000, "2018": 1374000}}
net_intangible_assets_2019 = df["Cost: -- Intangible assets, net"]["2019"]
net_intangible_assets_2018 = df["Cost: -- Intangible assets, net"]["2018"]
answer = (net_intangible_assets_2019 - net_intangible_assets_2018) / net_intangible_assets_2018 * 100.0