"time"	"presidents"
1945	NA
1945.25	87
1945.5	82
1945.75	75
1946	63
1946.25	50
1946.5	43
1946.75	32
1947	35
1947.25	60
1947.5	54
1947.75	55
1948	36
1948.25	39
1948.5	NA
1948.75	NA
1949	69
1949.25	57
1949.5	57
1949.75	51
1950	45
1950.25	37
1950.5	46
1950.75	39
1951	36
1951.25	24
1951.5	32
1951.75	23
1952	25
1952.25	32
1952.5	NA
1952.75	32
1953	59
1953.25	74
1953.5	75
1953.75	60
1954	71
1954.25	61
1954.5	71
1954.75	57
1955	71
1955.25	68
1955.5	79
1955.75	73
1956	76
1956.25	71
1956.5	67
1956.75	75
1957	79
1957.25	62
1957.5	63
1957.75	57
1958	60
1958.25	49
1958.5	48
1958.75	52
1959	57
1959.25	62
1959.5	61
1959.75	66
1960	71
1960.25	62
1960.5	61
1960.75	57
1961	72
1961.25	83
1961.5	71
1961.75	78
1962	79
1962.25	71
1962.5	62
1962.75	74
1963	76
1963.25	64
1963.5	62
1963.75	57
1964	80
1964.25	73
1964.5	69
1964.75	69
1965	71
1965.25	64
1965.5	69
1965.75	62
1966	63
1966.25	46
1966.5	56
1966.75	44
1967	44
1967.25	52
1967.5	38
1967.75	46
1968	36
1968.25	49
1968.5	35
1968.75	44
1969	59
1969.25	65
1969.5	65
1969.75	56
1970	66
1970.25	53
1970.5	61
1970.75	52
1971	51
1971.25	48
1971.5	54
1971.75	49
1972	49
1972.25	61
1972.5	NA
1972.75	NA
1973	68
1973.25	44
1973.5	40
1973.75	27
1974	28
1974.25	25
1974.5	24
1974.75	24