<human>: Answer by taking a quote from the following article:

Lula Grace Johnson (born March 13, 1929), known professionally as Jan Howard, is an American country music singer and Grand Ole Opry star. She attained popular success as a country female vocalist during the 1960s and early 1970s and was twice nominated for the Best Female Country Vocal Performance Grammy award. Many of her hits were written by her husband at the time, Harlan Howard. Howard's biggest hit and signature song was the 1966 country hit "Evil on Your Mind", which peaked at number five on the Billboard country charts.

In 1970, Howard and Anderson's record "If It's All the Same to You" hit number two on the country charts that year, just missing the top spot. Their album of the same name was released that year also. Their 1970 album Bill and Jan or Jan and Bill spawned two more top-10 country singles, "Someday We'll Be Together" (1970) and "Dis-Satisfied" (1971). In 1970 and 1971, the duet pair was nominated for Vocal Duo of the Year by the CMA Awards. Howard's solo recordings began to be somewhat less successful in the early 1970s, hitting the top 40 as a soloist only twice with "Rock Me Back to Little Rock" (1970) and "Love is Like a Spinning Wheel" (1972).  Howard's son David committed suicide. This devastated Howard, still reeling from her older son's death in Vietnam four years earlier, and she seriously considered quitting the music industry. She did limit her personal appearances for many years, retiring from the Bill Anderson touring show and ultimately replaced by Mary Lou Turner. In 1973, she left Decca Records (shortly after it changed into MCA Records) and recorded for several smaller labels, hitting the back of the country charts several times into the late 1970s. In 1976, she began appearing with Johnny Cash's touring show, performing as a soloist and as a backup member of the Carter Family, until being fired by Cash in 1980. References made by the media regarding an affair between Howard and Cash were rather poorly dismissed by Cash, and Cash biographies leave the question unresolved.  In 1978, Howard began occasionally performing as a background vocalist for her friend Tammy Wynette. She still performed as a soloist on the Grand Ole Opry and in concert, however. CANNOTANSWER

What happened in the 70's?
<bot>: Howard and Anderson's record "If It's All the Same to You" hit number two on the country charts that year,