What is the total liabilities of the company in 2019?
{"Operations: -- Revenue:": {"2019(1)": 11171297.0, "2018": 9030008.0, "2017": 7301505.0, "2016(3)": 5854430.0, "2015": 4795511.0}, "Operations: -- Gross profit": {"2019(1)": 9498577.0, "2018": 7835009.0, "2017": 6291014.0, "2016(3)": 5034522.0, "2015": 4051194.0}, "Operations: -- Income before income taxes": {"2019(1)": 3204741.0, "2018": 2793876.0, "2017": 2137641.0, "2016(3)": 1435138.0, "2015": 873781.0}, "Operations: -- Net income": {"2019(1)": 2951458.0, "2018": 2590774.0, "2017": 1693954.0, "2016(3)": 1168782.0, "2015": 629551.0}, "Net income per share: -- Basic": {"2019(1)": 6.07, "2018": 5.28, "2017": 3.43, "2016(3)": 2.35, "2015": 1.26}, "Net income per share: -- Diluted": {"2019(1)": 6.0, "2018": 5.2, "2017": 3.38, "2016(3)": 2.32, "2015": 1.24}, "Net income per share: -- Shares used to compute basic net income                                        per share": {"2019(1)": 486291.0, "2018": 490564.0, "2017": 493632.0, "2016(3)": 498345.0, "2015": 498764.0}, "Net income per share: -- Shares used to compute diluted net income per share": {"2019(1)": 491572.0, "2018": 497843.0, "2017": 501123.0, "2016(3)": 504299.0, "2015": 507164.0}, "Financial position: -- Cash, cash equivalents and short-term investments": {"2019(1)": 4176976.0, "2018": 3228962.0, "2017": 5819774.0, "2016(3)": 4761300.0, "2015": 3988084.0}, "Financial position: -- Working capital(2)": {"2019(1)": -1696013.0, "2018": 555913.0, "2017": 3720356.0, "2016(3)": 3028139.0, "2015": 2608336.0}, "Financial position: -- Total assets": {"2019(1)": 20762400.0, "2018": 18768682.0, "2017": 14535556.0, "2016(3)": 12697246.0, "2015": 11714500.0}, "Financial position: -- Debt, current": {"2019(1)": 3149343.0, "2018": "$\u2014", "2017": "$\u2014", "2016(3)": "$\u2014", "2015": "$\u2014"}, "Financial position: -- Debt, non-current": {"2019(1)": 988924.0, "2018": 4124800.0, "2017": 1881421.0, "2016(3)": 1892200.0, "2015": 1895259.0}, "Financial position: -- Stockholders equity": {"2019(1)": 10530155.0, "2018": 9362114.0, "2017": 8459869.0, "2016(3)": 7424835.0, "2015": 7001580.0}, "Additional data: -- Worldwide employees": {"2019(1)": 22634.0, "2018": 21357.0, "2017": 17973.0, "2016(3)": 15706.0, "2015": 13893.0}}
total_liabilities_2019 = df["Financial position: -- Debt, current"]["2019(1)"] + df["Financial position: -- Debt, non-current"]["2019(1)"]
answer = total_liabilities_2019