What if you have invested $1200 per year for 40 years in S&P 500?

sp500_40yrs_1200peryear.txt

AVG = 843590.1678300105
MIN = 527736.7934473859
MAX = 1533648.0450294716
Median = 814354.2966330119

Start 1926, End 1965, Sum 986971.08
Start 1927, End 1966, Sum 831554.58
Start 1928, End 1967, Sum 968908.01
Start 1929, End 1968, Sum 1026075.49
Start 1930, End 1969, Sum 907254.80
Start 1931, End 1970, Sum 907742.95
Start 1932, End 1971, Sum 982480.40
Start 1933, End 1972, Sum 1051671.12
Start 1934, End 1973, Sum 788174.20
Start 1935, End 1974, Sum 527736.79
Start 1936, End 1975, Sum 652354.33
Start 1937, End 1976, Sum 747850.96
Start 1938, End 1977, Sum 652636.01
Start 1939, End 1978, Sum 626803.33
Start 1940, End 1979, Sum 680644.89
Start 1941, End 1980, Sum 818915.19
Start 1942, End 1981, Sum 691330.36
Start 1943, End 1982, Sum 720073.30
Start 1944, End 1983, Sum 760050.16
Start 1945, End 1984, Sum 704362.93
Start 1946, End 1985, Sum 814354.30
Start 1947, End 1986, Sum 867723.09
Start 1948, End 1987, Sum 799943.28
Start 1949, End 1988, Sum 807798.41
Start 1950, End 1989, Sum 907573.23
Start 1951, End 1990, Sum 751882.44
Start 1952, End 1991, Sum 855039.69
Start 1953, End 1992, Sum 810839.29
Start 1954, End 1993, Sum 790996.02
Start 1955, End 1994, Sum 697355.50
Start 1956, End 1995, Sum 866151.73
Start 1957, End 1996, Sum 977779.69
Start 1958, End 1997, Sum 1194539.11
Start 1959, End 1998, Sum 1377472.31
Start 1960, End 1999, Sum 1533648.05
Start 1961, End 2000, Sum 1285492.08
Start 1962, End 2001, Sum 1037513.21
Start 1963, End 2002, Sum 750104.14
Start 1964, End 2003, Sum 883519.72
Start 1965, End 2004, Sum 905800.55
Start 1966, End 2005, Sum 883824.92
Start 1967, End 2006, Sum 955049.89
Start 1968, End 2007, Sum 926973.36
Start 1969, End 2008, Sum 543195.72
Start 1970, End 2009, Sum 641127.36
Start 1971, End 2010, Sum 679563.31
Start 1972, End 2011, Sum 636715.76
Start 1973, End 2012, Sum 680707.04
Start 1974, End 2013, Sum 836820.69
Start 1975, End 2014, Sum 864879.06
Start 1976, End 2015, Sum 756884.16
Start 1977, End 2016, Sum 749891.02
Start 1978, End 2017, Sum 817798.73
Start 1979, End 2018, Sum 682937.33
Start 1980, End 2019, Sum 775943.38
Start 1981, End 2020, Sum 796550.71
Start 1982, End 2021, Sum 906660.42