Time (yrs),C02 (ppm)
1958.00,309
1958.25,317
1958.50,318
1958.75,321
1959.00,320
1959.25,310
1959.50,309
1959.75,310
1960.00,312
1960.25,311
1960.50,320
1960.75,323
1961.00,310
1961.25,316
1961.50,321
1961.75,307
1962.00,317
1962.25,311
1962.50,321
1962.75,324
1963.00,315
1963.25,327
1963.50,315
1963.75,328
1964.00,320
1964.25,329
1964.50,313
1964.75,327
1965.00,318
1965.25,317
1965.50,315
1965.75,321
1966.00,322
1966.25,316
1966.50,324
1966.75,318
1967.00,330
1967.25,325
1967.50,313
1967.75,313
1968.00,326
1968.25,319
1968.50,326
1968.75,326
1969.00,330
1969.25,317
1969.50,325
1969.75,328
1970.00,320
1970.25,324
1970.50,328
1970.75,321
1971.00,326
1971.25,316
1971.50,329
1971.75,332
1972.00,315
1972.25,318
1972.50,324
1972.75,331
1973.00,321
1973.25,334
1973.50,331
1973.75,330
1974.00,333
1974.25,328
1974.50,322
1974.75,332
1975.00,326
1975.25,333
1975.50,336
1975.75,330
1976.00,331
1976.25,338
1976.50,335
1976.75,329
1977.00,329
1977.25,335
1977.50,338
1977.75,340
1978.00,329
1978.25,335
1978.50,332
1978.75,331
1978.00,339
1978.25,344
1978.50,342
1978.75,345
1979.00,336
1979.25,337
1979.50,338
1979.75,330
1980.00,349
1980.25,343
1980.50,333
1980.75,337
1981.00,350
1981.25,340
1981.50,341
1981.75,334
1982.00,344
1982.25,353
1982.50,351
1982.75,345
1983.00,341
1983.25,336
1983.50,347
1983.75,341
1984.00,339
1984.25,338
1984.50,337
1984.75,352
1985.00,343
1985.25,341
1985.50,347
1985.75,352
1986.00,342
1986.25,344
1986.50,358
1986.75,356
1987.00,357
1987.25,349
1987.50,356
1987.75,355
1988.00,360
1988.25,362
1988.50,347
1988.75,359
1989.00,354
1989.25,353
1989.50,359
1989.75,362
1990.00,361
1990.25,362
1990.50,363
1990.75,364
1991.00,354
1991.25,367
1991.50,357
1991.75,351
1992.00,355
1992.25,358
1992.50,352
1992.75,361
1993.00,365
1993.25,367
1993.50,368
1993.75,365
1994.00,363
1994.25,364
1994.50,367
1994.75,363
1995.00,353
1995.25,360
1995.50,365
1995.75,369
1996.00,369
1996.25,360
1996.50,373
1996.75,372
1997,365
1997.25,362
1997.5,362
1997.75,370