How do these series compare to each other? Why do you think that ?

FRED Market Yield on U.S. Treasury Securities at 5-Year Constant Maturity Market Yield on U.S. Treasury Securities at 5-Year Constant Maturity, Inflation-Indexed Market Yield on U.S. Treasury Securities at 10-Year Constant Maturity Market Yield on U.S. Treasury Securities at 10-Year Constant Maturity, Inflation-Indexed Market Yield on U.S. Treasury Securities at 20-Year Constant Maturity Market Yield on U.S. Treasury Securities at 20-Year Constant Maturity, Inflation-Indexed Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity Market Yield on U.S. Treasury Securities at 30-Year Constant Maturity, Inflation-Indexed 5 4 3 0 -1 -2 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 Shaded areas indicate U.S. recessions. Source: Board of Governors of the Federal Reserve System (US) fred.stlouisfed.org