,Instrument,"U.S. government securities/Treasury constant maturities/Nominal" ,Maturity,"10-year" ,Frequency,"Annual (Dec)" ,Description,"Market yield on U.S. Treasury securities at 10-year^ constant maturity, quoted on investment basis" ,Note,"Yields on actively traded non-inflation-indexed issues adjusted to constant maturities. The 30-year Treasury constant maturity series was discontinued on February 18, 2002, and reintroduced on February 9, 2006. From February 18, 2002, to February 9, 2006, the U.S. Treasury published a factor for adjusting the daily nominal 20-year constant maturity in order to estimate a 30-year nominal rate. The historical adjustment factor can be found at www.treas.gov/offices/domestic-finance/debt-management/interest-rate/ltcompositeindex_historical.shtml. Source: U.S. Treasury." DATE , TCMNOMY10 1962, 3.95 1963, 4.00 1964, 4.19 1965, 4.28 1966, 4.93 1967, 5.07 1968, 5.64 1969, 6.67 1970, 7.35 1971, 6.16 1972, 6.21 1973, 6.85 1974, 7.56 1975, 7.99 1976, 7.61 1977, 7.42 1978, 8.41 1979, 9.43 1980, 11.43 1981, 13.92 1982, 13.01 1983, 11.10 1984, 12.46 1985, 10.62 1986, 7.67 1987, 8.39 1988, 8.85 1989, 8.49 1990, 8.55 1991, 7.86 1992, 7.01 1993, 5.87 1994, 7.09 1995, 6.57 1996, 6.44 1997, 6.35 1998, 5.26 1999, 5.65 2000, 6.03 2001, 5.02 2002, 4.61 2003, 4.01 2004, 4.27 2005, 4.29