% Atmospheric lifetimes are 44 for CFC-11 % and 125 for CFC-12 % and 1278 for SF6 (Kovacs et al., 2017) % rel= 0 % <-Northern Data-> <-Southern Data-> % Year CFC-11 CFC-12 SF6 CFC-11 CFC-12 SF6 % (ppt) (ppt) (ppt) (ppt) (ppt) (ppt) 1931.5 0.00 0.00 0.00 0.00 0.00 0.00 1932.5 0.00 0.00 0.00 0.00 0.00 0.00 1933.5 0.00 0.00 0.00 0.00 0.00 0.00 1934.5 0.00 0.00 0.00 0.00 0.00 0.00 1935.5 0.00 0.00 0.00 0.00 0.00 0.00 1936.5 0.00 0.10 0.00 0.00 0.00 0.00 1937.5 0.00 0.10 0.00 0.00 0.10 0.00 1938.5 0.00 0.20 0.00 0.00 0.10 0.00 1939.5 0.00 0.30 0.00 0.00 0.20 0.00 1940.5 0.00 0.40 0.00 0.00 0.30 0.00 1941.5 0.00 0.50 0.00 0.00 0.40 0.00 1942.5 0.00 0.70 0.00 0.00 0.50 0.00 1943.5 0.00 0.90 0.00 0.00 0.70 0.00 1944.5 0.00 1.20 0.00 0.00 0.90 0.00 1945.5 0.10 1.70 0.00 0.00 1.20 0.00 1946.5 0.10 2.30 0.00 0.10 1.70 0.00 1947.5 0.10 3.40 0.00 0.10 2.40 0.00 1948.5 0.20 4.80 0.00 0.10 3.40 0.00 1949.5 0.40 6.10 0.00 0.20 4.70 0.00 1950.5 0.70 7.60 0.00 0.40 6.00 0.00 1951.5 1.01 9.20 0.00 0.70 7.40 0.00 1952.5 1.51 11.00 0.00 1.01 9.00 0.00 1953.5 2.21 12.80 0.04 1.51 10.70 0.04 1954.5 3.02 15.00 0.04 2.21 12.60 0.04 1955.5 4.12 17.40 0.04 3.02 14.70 0.04 1956.5 5.33 20.20 0.04 4.02 17.10 0.04 1957.5 6.83 23.40 0.05 5.23 19.90 0.04 1958.5 8.14 26.80 0.05 6.53 23.00 0.04 1959.5 9.45 30.50 0.05 7.84 26.30 0.05 1960.5 11.06 35.00 0.05 9.15 30.10 0.05 1961.5 13.27 40.00 0.06 10.85 34.40 0.06 1962.5 16.18 45.80 0.07 13.07 39.40 0.06 1963.5 19.60 52.50 0.08 15.78 45.10 0.07 1964.5 23.72 60.40 0.09 19.20 51.80 0.08 1965.5 28.44 69.30 0.11 23.12 59.50 0.10 1966.5 33.67 79.20 0.13 27.64 68.20 0.12 1967.5 39.40 90.30 0.15 32.66 77.90 0.14 1968.5 46.03 102.80 0.18 38.29 88.80 0.17 1969.5 53.77 116.80 0.21 44.82 101.10 0.19 1970.5 62.41 132.00 0.23 52.26 114.70 0.22 1971.5 72.06 148.40 0.26 60.70 129.60 0.24 1972.5 82.71 166.10 0.30 69.95 145.70 0.28 1973.5 94.87 185.80 0.34 80.40 163.30 0.31 1974.5 108.34 207.10 0.38 92.16 182.50 0.35 1975.5 121.41 228.20 0.44 104.72 202.90 0.40 1976.5 133.97 248.10 0.50 117.09 223.20 0.46 1977.5 145.93 266.90 0.58 129.35 242.70 0.53 1978.5 156.58 284.30 0.66 140.80 261.20 0.61 1979.5 168.34 306.10 0.76 148.74 273.50 0.70 1980.5 176.68 323.20 0.88 159.30 292.30 0.81 1981.5 184.32 339.60 1.00 167.84 308.80 0.93 1982.5 191.46 353.40 1.13 176.08 325.50 1.04 1983.5 199.30 369.00 1.27 184.52 342.60 1.17 1984.5 208.04 385.70 1.40 192.46 359.40 1.29 1985.5 217.99 403.40 1.55 202.01 378.20 1.43 1986.5 229.35 424.30 1.71 211.36 396.50 1.58 1987.5 241.61 444.00 1.88 222.21 416.30 1.73 1988.5 252.86 465.40 2.05 233.27 435.80 1.89 1989.5 259.30 483.60 2.22 242.11 454.40 2.05 1990.5 265.83 497.70 2.41 251.06 472.70 2.22 1991.5 268.24 506.00 2.62 256.68 487.30 2.42 1992.5 268.14 516.30 2.85 260.80 498.30 2.63 1993.5 269.55 523.20 3.09 262.51 507.00 2.84 1994.5 269.65 528.50 3.33 263.72 514.80 3.07 1995.5 268.34 533.40 3.58 263.22 521.00 3.30 1996.5 266.93 537.30 3.86 262.91 526.50 3.55 1997.5 265.73 540.10 4.07 262.01 530.80 3.81 1998.5 264.52 542.90 4.25 261.01 534.30 4.01 1999.5 263.12 544.40 4.48 259.90 537.20 4.25 2000.5 261.71 545.90 4.68 258.29 539.00 4.46 2001.5 260.00 546.50 4.90 256.98 540.60 4.65 2002.5 258.19 546.70 5.14 255.08 541.30 4.88 2003.5 256.18 546.70 5.37 253.27 541.60 5.07 2004.5 253.97 545.70 5.58 251.36 541.50 5.30 2005.5 251.96 544.90 5.80 249.15 540.70 5.51 2006.5 249.55 543.10 6.04 247.34 539.80 5.75 2007.5 247.54 541.10 6.33 245.03 538.10 6.03 2008.5 245.63 538.60 6.62 243.12 536.20 6.29 2009.5 243.61 536.12 6.89 241.05 533.47 6.58 2010.5 241.31 533.26 7.21 239.15 531.03 6.87 2011.5 239.40 530.60 7.46 236.84 528.53 7.17 2012.5 236.89 527.20 7.73 234.77 526.00 7.43 2013.5 235.57 525.22 8.09 232.88 523.25 7.73 2014.5 234.97 522.97 8.40 231.49 521.00 8.11 2015.5 234.36 520.71 8.72 230.09 518.74 8.50