Expenditure (Thousands in USD) 4. -120 -100 -60 -40 -20 80 60 40 80 20 1950 195 1953 1956 1957 1959 1960 1962 1963 1965 1966 1968 1969 1971 1972 1974 1975 briefly describe what you see: interpret the values of some peaks and troughs. 1977 1978 1980 -Detrended 1981 Detrended Expenditure with its Cyclical Component 1983 Time 1986 1987 -Cycle 1989 1990 1992 1993 1995 1996 1998 1999 2001 2002 2004 2005 2007 2008 2010 2011 2013 2014 2016 2017 2019 2020Expenditure 1000 1200 1600 1400 600 200 800 400 0 1950 1952 briefly describe what you see. 1954 1956 1958 1960 1962 1964 1966 1968 1970 1972 1974 - Quadratic Trend 1976 1978 1980 1982 Expenditure: Trend and Low Frequency Component 1984 Time 1986 1988 . . . . Low Frequency 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020