Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Year | Title | Billboard Hot 100 | Album | Label |
| --- | --- | --- | --- | --- |
| 1963.0 | Dooley | — | Back Porch Bluegrass | Elektra |
| 1963.0 | Hootin' Banjo [Duelin' Banjo] | — | Back Porch Bluegrass | Elektra |
| 1965.0 | Nobody Knows | — | singles only | Capitol |
| 1966.0 | The Last Thing On My Mind | — | singles only | Capitol |
| 1968.0 | Reason To Believe | — | Wheatstraw Suite | Elektra |
| 1969.0 | Listen To The Sound | — | Wheatstraw Suite | Elektra |
| 1970.0 | Rainmaker | — | Copperfields | Elektra |
| 1970.0 | Close The Door Lightly | — | Copperfields | Elektra |
| 1970.0 | One Too Many Mornings | — | singles only | White Whale |
| 1970.0 | Comin' Home Again | — | singles only | White Whale |
| 1971.0 | It's About Time | No.92 | singles only | Anthem |
| 1972.0 | One A.M. | No.111 | Roots and Branches | Anthem |
| 1972.0 | America (The Lady Of The Harbor) | — | single only | Anthem |
| 1973.0 | Hot Rod Banjo | — | Tribute to the American Duck | Poppy |
| 1975.0 | Stones Throw Away | — | single only | United Artists |
| 1977.0 | The Poet | — | The Dillards Vs. The Incredible L.A. Time Machine | Sonet |
Question:
What is the total years for roots and branches?
Answer:
1972.0